build(deps): bump webfactory/ssh-agent from 0.5.4 to 0.8.0

Bumps [webfactory/ssh-agent](https://github.com/webfactory/ssh-agent) from 0.5.4 to 0.8.0.
- [Release notes](https://github.com/webfactory/ssh-agent/releases)
- [Changelog](https://github.com/webfactory/ssh-agent/blob/master/CHANGELOG.md)
- [Commits](webfactory/ssh-agent@v0.5.4...v0.8.0)

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

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

.github/workflows/deploy.yml

@@ -117,7 +117,7 @@ jobs:
         with:
           fetch-depth: 0
 
-      - uses: webfactory/ssh-agent@v0.5.4
+      - uses: webfactory/ssh-agent@v0.8.0
         with:
           ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}