Merge pull request #352 from OpenPrinting/dependabot/github_actions/redhat-plumbers-in-action/differential-shellcheck-5.1.1

Bump redhat-plumbers-in-action/differential-shellcheck from 5.1.0 to 5.1.1

Author: zdohnal

.github/workflows/differential-shellcheck.yml

@@ -21,6 +21,6 @@ jobs:
           fetch-depth: 0
 
       - name: Differential ShellCheck
-        uses: redhat-plumbers-in-action/differential-shellcheck@b9df2a9417f69c056e0aeaf870abd9a2065a403e
+        uses: redhat-plumbers-in-action/differential-shellcheck@c15070885a82a2c93db8a765d332c38c50dde8b3
         with:
           token: ${{ secrets.GITHUB_TOKEN }}