fix example

Author: tonglil

README.md

@@ -21,13 +21,14 @@ Drone 0.5+:
 
 ```yml
 pipeline:
-  image: tonglil/auth-gke
-  environment:
-    PROJECT: my-project
-    ZONE: us-central1-b
-    CLUSTER: my-cluster
-  commands:
-    - auth-gke
-    - kubectl ...
-  secret: [google_credentials]
+  gke-actions:
+    image: tonglil/auth-gke
+    environment:
+      PROJECT: my-project
+      ZONE: us-central1-b
+      CLUSTER: my-cluster
+    commands:
+      - auth-gke
+      - kubectl ...
+    secret: [google_credentials]
 ```