Bump bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml (#6581)

Bumps [bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml](https://github.com/bazel-contrib/publish-to-bcr) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/bazel-contrib/publish-to-bcr/releases)
- [Commits](bazel-contrib/publish-to-bcr@0bd40ad...0a23c53)

---
updated-dependencies:
- dependency-name: bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml
  dependency-version: 1.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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.github/workflows/post-release.yml

@@ -81,7 +81,7 @@ jobs:
       - setup-credentials
       - merge-into-base-branch
     if: ${{ !github.event.release.prerelease }}
-    uses: bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml@0bd40ad4f872b4d216d3f01bc0844ade304e2b5a # v1.1.0
+    uses: bazel-contrib/publish-to-bcr/.github/workflows/publish.yaml@0a23c53c2baffdaf2ce8dd23c2c0e45eb3b79093 # v1.2.0
     permissions:
       contents: write
     with: