Update CI to Swift 6.0.3 (#1736)

Author: thomasvl

.github/workflows/build.yml

@@ -25,7 +25,7 @@ jobs:
         # seems better. This should also ensure protobuf caching changes with
         # each new image incase system in the Swift image are changed/updated.
         swift:
-        - version: 6.0.2-noble
+        - version: 6.0.3-noble
           hook: "SWIFT_BUILD_TEST_HOOK=\"-Xswiftc -warnings-as-errors\""
         - version: 5.10.1-noble
           # No "hook", see https://github.com/apple/swift-protobuf/issues/1560 for the

.github/workflows/regular_conformance.yml

@@ -35,7 +35,7 @@ jobs:
         # seems better. This should also ensure protobuf caching changes with
         # each new image incase system in the Swift image are changed/updated.
         swift:
-        - 6.0.2-noble
+        - 6.0.3-noble
         # protobuf_git can reference a commit, tag, or branch
         # commit: "commits/6935eae45c99926a000ecbef0be20dfd3d159e71"
         # tag: "ref/tags/v3.11.4"