chore(deps): bump webfactory/ssh-agent from v0.5.0 to v0.5.1

Bumps [webfactory/ssh-agent](https://github.com/webfactory/ssh-agent) from v0.5.0 to v0.5.1.
- [Release notes](https://github.com/webfactory/ssh-agent/releases)
- [Changelog](https://github.com/webfactory/ssh-agent/blob/master/CHANGELOG.md)
- [Commits](webfactory/ssh-agent@v0.5.0...4b6f4eb)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/nightly.yaml

@@ -22,7 +22,7 @@ jobs:
       - name: Build
         run: make release-local
 
-      - uses: webfactory/ssh-agent@v0.5.0
+      - uses: webfactory/ssh-agent@v0.5.1
         with:
           ssh-private-key: ${{ secrets.OKCTL_BOT_NIGHTLY_BUILD_SECRET_KEY }}