Use desktop engineering's has-diff

.github/workflows/qa.yaml

@@ -54,16 +54,17 @@ jobs:
         if: always() && !cancelled()
         working-directory: ${{ matrix.subproject }}
         run: |
-          # Ensuring there is no diff between current and generated go.mod and go.sum files
+          # Updating go.mod and go.sum files
           set -eu
 
           echo "::group::Download dependencies"
           go mod tidy
           echo "::endgroup::"
       - name: Ensure module files are up to date
-        uses: ./.github/actions/check-diff
+        uses: canonical/desktop-engineering/gh-actions/common/has-diff@main
         with:
-          files-to-validate: ${{ matrix.subproject }}/**/go.mod ${{ matrix.subproject }}/**/go.sum
+          working-directory: ${{ matrix.subproject }}
+          fail-on-diff: true
       - name: Build
         shell: bash
         if: always() && !cancelled()
@@ -124,9 +125,11 @@ jobs:
           flutter-version: ${{ env.flutter-version }}
           package-dir: '${{ matrix.package }}'
           run-build-runner: ${{ contains(matrix.package, 'ubuntupro') }}
-      - uses: ./.github/actions/check-diff
+      - name: Ensure module files are up to date
+        uses: canonical/desktop-engineering/gh-actions/common/has-diff@main
         with:
-          files-to-validate: '${{ matrix.package }}/**/*.dart'
+          working-directory: ${{ matrix.package }}
+          fail-on-diff: true
 
   flutter-integration:
     name: "Flutter integration tests"