Fix whitespace consistency in config.md

*Some* of the sub-items of `config` were inconsistently indented (some using three spaces, some using two) -- adjusted to two to match the rest of the file.

Signed-off-by: Tianon Gravi <[email protected]>

Author: tianon

config.md

@@ -133,51 +133,51 @@ Note: Any OPTIONAL field MAY also be set to null, which is equivalent to being a
   The execution parameters which SHOULD be used as a base when running a container using the image.
   This field can be `null`, in which case any execution parameters should be specified at creation of the container.
 
-   - **User** *string*, OPTIONAL
+  - **User** *string*, OPTIONAL
 
-     The username or UID which is a platform-specific structure that allows specific control over which user the process run as.
-     This acts as a default value to use when the value is not specified when creating a container.
-     For Linux based systems, all of the following are valid: `user`, `uid`, `user:group`, `uid:gid`, `uid:group`, `user:gid`.
-     If `group`/`gid` is not specified, the default group and supplementary groups of the given `user`/`uid` in `/etc/passwd` from the container are applied.
+    The username or UID which is a platform-specific structure that allows specific control over which user the process run as.
+    This acts as a default value to use when the value is not specified when creating a container.
+    For Linux based systems, all of the following are valid: `user`, `uid`, `user:group`, `uid:gid`, `uid:group`, `user:gid`.
+    If `group`/`gid` is not specified, the default group and supplementary groups of the given `user`/`uid` in `/etc/passwd` from the container are applied.
 
-   - **ExposedPorts** *object*, OPTIONAL
+  - **ExposedPorts** *object*, OPTIONAL
 
-     A set of ports to expose from a container running this image.
-     Its keys can be in the format of:
+    A set of ports to expose from a container running this image.
+    Its keys can be in the format of:
 `port/tcp`, `port/udp`, `port` with the default protocol being `tcp` if not specified.
-     These values act as defaults and are merged with any specified when creating a container.
-     **NOTE:** This JSON structure value is unusual because it is a direct JSON serialization of the Go type `map[string]struct{}` and is represented in JSON as an object mapping its keys to an empty object.
+    These values act as defaults and are merged with any specified when creating a container.
+    **NOTE:** This JSON structure value is unusual because it is a direct JSON serialization of the Go type `map[string]struct{}` and is represented in JSON as an object mapping its keys to an empty object.
 
-   - **Env** *array of strings*, OPTIONAL
+  - **Env** *array of strings*, OPTIONAL
 
-     Entries are in the format of `VARNAME=VARVALUE`.
-     These values act as defaults and are merged with any specified when creating a container.
+    Entries are in the format of `VARNAME=VARVALUE`.
+    These values act as defaults and are merged with any specified when creating a container.
 
-   - **Entrypoint** *array of strings*, OPTIONAL
+  - **Entrypoint** *array of strings*, OPTIONAL
 
-     A list of arguments to use as the command to execute when the container starts.
-     These values act as defaults and may be replaced by an entrypoint specified when creating a container.
+    A list of arguments to use as the command to execute when the container starts.
+    These values act as defaults and may be replaced by an entrypoint specified when creating a container.
 
-   - **Cmd** *array of strings*, OPTIONAL
+  - **Cmd** *array of strings*, OPTIONAL
 
-     Default arguments to the entrypoint of the container.
-     These values act as defaults and may be replaced by any specified when creating a container.
-     If an `Entrypoint` value is not specified, then the first entry of the `Cmd` array SHOULD be interpreted as the executable to run.
+    Default arguments to the entrypoint of the container.
+    These values act as defaults and may be replaced by any specified when creating a container.
+    If an `Entrypoint` value is not specified, then the first entry of the `Cmd` array SHOULD be interpreted as the executable to run.
 
-   - **Volumes** *object*, OPTIONAL
+  - **Volumes** *object*, OPTIONAL
 
-     A set of directories describing where the process is likely to write data specific to a container instance.
-     **NOTE:** This JSON structure value is unusual because it is a direct JSON serialization of the Go type `map[string]struct{}` and is represented in JSON as an object mapping its keys to an empty object.
+    A set of directories describing where the process is likely to write data specific to a container instance.
+    **NOTE:** This JSON structure value is unusual because it is a direct JSON serialization of the Go type `map[string]struct{}` and is represented in JSON as an object mapping its keys to an empty object.
 
-   - **WorkingDir** *string*, OPTIONAL
+  - **WorkingDir** *string*, OPTIONAL
 
-     Sets the current working directory of the entrypoint process in the container.
-     This value acts as a default and may be replaced by a working directory specified when creating a container.
+    Sets the current working directory of the entrypoint process in the container.
+    This value acts as a default and may be replaced by a working directory specified when creating a container.
 
-   - **Labels** *object*, OPTIONAL
+  - **Labels** *object*, OPTIONAL
 
-     The field contains arbitrary metadata for the container.
-     This property MUST use the [annotation rules](annotations.md#rules).
+    The field contains arbitrary metadata for the container.
+    This property MUST use the [annotation rules](annotations.md#rules).
 
   - **StopSignal** *string*, OPTIONAL