Merge pull request #367 from OpenPrinting/dependabot/github_actions/actions/checkout-4.1.6

Bump actions/checkout from 4.1.4 to 4.1.6

Author: zdohnal

.github/workflows/differential-shellcheck.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps: 
       - name: Repository checkout
-        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
+        uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
         with:
           fetch-depth: 0