Bump webfactory/ssh-agent from 0.6.0 to 0.9.0

Bumps [webfactory/ssh-agent](https://github.com/webfactory/ssh-agent) from 0.6.0 to 0.9.0.
- [Release notes](https://github.com/webfactory/ssh-agent/releases)
- [Changelog](https://github.com/webfactory/ssh-agent/blob/master/CHANGELOG.md)
- [Commits](webfactory/ssh-agent@v0.6.0...v0.9.0)

---
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>

Author: dependabot[bot]

.github/workflows/docs.yml

@@ -26,7 +26,7 @@ jobs:
       run: npm install
 
     - name: Install SSH Client 🔑
-      uses: webfactory/ssh-agent@v0.6.0
+      uses: webfactory/ssh-agent@v0.9.0
       with:
         ssh-private-key: ${{ secrets.DEPLOY_KEY }}