Upgrade GitHub Actions to latest versions

[salmanmkc]

Summary

Upgrade GitHub Actions to their latest versions for improved features, bug fixes, and security updates.

Changes

Action	Old Version(s)	New Version	Release	Files
actions-rust-lang/setup-rust-toolchain	v1	v1.15.2	Release	postgres-extension-ci.yml, ruvector-postgres-ci.yml
benchmark-action/github-action-benchmark	v1	v1.20.7	Release	benchmarks.yml, postgres-extension-ci.yml, ruvector-postgres-ci.yml
codecov/codecov-action	v4	v5	Release	agentic-synth-ci.yml
docker/build-push-action	v5	v6	Release	docker-publish.yml, postgres-extension-ci.yml, ruvector-postgres-ci.yml
google-github-actions/auth	v2	v3	Release	edge-net-models.yml
google-github-actions/setup-gcloud	v2	v3	Release	edge-net-models.yml
peter-evans/create-or-update-comment	v4	v5	Release	edge-net-models.yml
peter-evans/dockerhub-description	v4	v5	Release	docker-publish.yml
softprops/action-gh-release	v1	v2	Release	publish-all.yml, release.yml

Why upgrade?

Keeping GitHub Actions up to date ensures:

• Security: Latest security patches and fixes
• Features: Access to new functionality and improvements
• Compatibility: Better support for current GitHub features
• Performance: Optimizations and efficiency improvements

⚠️ Breaking Changes

• codecov/codecov-action (v4 → v5): Major version upgrade — review the release notes for breaking changes
  • ⚠️ Input file was removed — if your workflow uses it, the step may fail
  • ⚠️ Input plugin was removed — if your workflow uses it, the step may fail
• softprops/action-gh-release (v1 → v2): Major version upgrade — review the release notes for breaking changes
• docker/build-push-action (v5 → v6): Major version upgrade — review the release notes for breaking changes
• google-github-actions/auth (v2 → v3): Major version upgrade — review the release notes for breaking changes
  • ⚠️ Input retries was removed — if your workflow uses it, the step may fail
  • ⚠️ Input backoff was removed — if your workflow uses it, the step may fail
  • ⚠️ Input backoff_limit was removed — if your workflow uses it, the step may fail
• google-github-actions/setup-gcloud (v2 → v3): Major version upgrade — review the release notes for breaking changes
  • ⚠️ Input skip_tool_cache was removed — if your workflow uses it, the step may fail
• peter-evans/create-or-update-comment (v4 → v5): Major version upgrade — review the release notes for breaking changes
• peter-evans/dockerhub-description (v4 → v5): Major version upgrade — review the release notes for breaking changes

Security Note

Actions that were previously pinned to commit SHAs remain pinned to SHAs (updated to the latest release SHA) to maintain the security benefits of immutable references.

Testing

These changes only affect CI/CD workflow configurations and should not impact application functionality. The workflows should be tested by running them on a branch before merging.