Merge pull request #360 from OpenPrinting/dependabot/github_actions/actions/checkout-4.1.4

Bump actions/checkout from 4.1.1 to 4.1.4

Author: zdohnal

.github/workflows/differential-shellcheck.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps: 
       - name: Repository checkout
-        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
+        uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b
         with:
           fetch-depth: 0