Merge pull request #338 from OpenPrinting/dependabot/github_actions/redhat-plumbers-in-action/differential-shellcheck-5.0.1

Bump redhat-plumbers-in-action/differential-shellcheck from 4.2.2 to 5.0.1

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@ac4483d8c6713bd2011037f44fe626989468af74
+        uses: redhat-plumbers-in-action/differential-shellcheck@aa647ec4466543e8555c2c3b648124a9813cee44
         with:
           token: ${{ secrets.GITHUB_TOKEN }}