build(deps): bump webfactory/ssh-agent from 0.5.3 to 0.5.4 (#3781)

Bumps [webfactory/ssh-agent](https://github.com/webfactory/ssh-agent) from 0.5.3 to 0.5.4.
- [Release notes](https://github.com/webfactory/ssh-agent/releases)
- [Changelog](https://github.com/webfactory/ssh-agent/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webfactory/ssh-agent/compare/v0.5.3...v0.5.4)

---
updated-dependencies:
- dependency-name: webfactory/ssh-agent
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/git-sync.yml

@@ -10,8 +10,8 @@ jobs:
   GitHub-to-Bitbucket:
     runs-on: ubuntu-latest
     steps:
-    - name: webfactory/ssh-agent@v0.5.3
-      uses: webfactory/ssh-agent@v0.5.3
+    - name: webfactory/ssh-agent@v0.5.4
+      uses: webfactory/ssh-agent@v0.5.4
       with:
         ssh-private-key: ${{ secrets.BITBUCKET_SECRET }}