GH Actions: Replace tj-actions/changed-files by custom code

Signed-off-by: Florian Hotze <[email protected]>

Author: florian-h05

Diff for: .github/workflows/build.yaml

@@ -38,8 +38,10 @@ jobs:
         run: npm run build
 
       - name: Verify Changed Files
-        uses: tj-actions/verify-changed-files@v20
         id: verify-changed-files
+        run: |
+          changed_files=$(git diff --name-only ${{ github.sha }} | tr '\n' ' ')
+          echo "changed_files=$changed_files" >> $GITHUB_OUTPUT
 
       - name: Fail on Changed Files
         if: steps.verify-changed-files.outputs.changed_files != ''