chore(deps): bump docker/cagent-action in the github-actions group (#909)

Bumps the github-actions group with 1 update: [docker/cagent-action](https://github.com/docker/cagent-action).


Updates `docker/cagent-action` from 1.4.3 to 1.5.1
- [Release notes](https://github.com/docker/cagent-action/releases)
- [Commits](docker/cagent-action@ec48655...0498757)

---
updated-dependencies:
- dependency-name: docker/cagent-action
  dependency-version: 1.5.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/release.yml

@@ -165,7 +165,7 @@ jobs:
           fetch-depth: 0
 
       - name: Generate release notes
-        uses: docker/cagent-action@ec4865576952df6285652f2cf8ffb4ad45ff5f80
+        uses: docker/cagent-action@0498757af1c50b084f763d626f571918cf317509
         with:
           agent: .github/agents/release-notes-generator.yaml
           anthropic-api-key: ${{ secrets.ANTHROPIC_API_KEY }}