Bump burnett01/rsync-deployments from 4.1 to 5.1

Bumps [burnett01/rsync-deployments](https://github.com/burnett01/rsync-deployments) from 4.1 to 5.1.
- [Release notes](https://github.com/burnett01/rsync-deployments/releases)
- [Commits](Burnett01/rsync-deployments@4.1...5.1)

---
updated-dependencies:
- dependency-name: burnett01/rsync-deployments
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/deploy.yml

@@ -22,7 +22,7 @@ jobs:
           ${{ runner.os }}-gems-
     - uses:  lemonarc/[email protected]
     - name: rsync deployments
-      uses: burnett01/rsync-deployments@4.1
+      uses: burnett01/rsync-deployments@5.1
       with:
         switches: -avzr --delete
         path: _site