GH Actions: Fix auto formatter

.github/workflows/format.yml

@@ -5,22 +5,23 @@ on: [pull_request]
 jobs:
   clang-format-8:
     runs-on: ubuntu-latest
+    container: "docker://ghcr.io/wolletd/clang-format:latest"
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         ref: ${{ github.event.pull_request.head.sha }}
-    - name: Run clang-foramt on changed files
+    - name: Run clang-format on changed files
       run: |
         set -x
         git fetch origin ${{ github.event.pull_request.base.ref }}
         git fetch origin pull/${{ github.event.pull_request.number }}/head:${{ github.event.pull_request.head.ref }}
         BASE_COMMIT=$(git rev-parse ${{ github.event.pull_request.base.sha }})
-        COMMIT_FILES=$(git diff --name-only ${BASE_COMMIT} | grep -i -v LinkDef)
-        RESULT_OUTPUT=$(git-clang-format-8 --commit ${BASE_COMMIT} --diff --binary $(which clang-format-8) ${COMMIT_FILES})
+        COMMIT_FILES=$(git diff --name-only "${BASE_COMMIT}" | grep -i -v LinkDef)
+        RESULT_OUTPUT=$(git-clang-format-8 --commit "${BASE_COMMIT}" --diff --binary "$(which clang-format-8)" "${COMMIT_FILES}")
         if [ "$RESULT_OUTPUT" == "no modified files to format" ] || [ "$RESULT_OUTPUT" == "clang-format did not modify any files" ]; then
           exit 0
         else
-          git-clang-format-8 --commit $BASE_COMMIT --diff --binary $(which clang-format-8)
+          git-clang-format-8 --commit "$BASE_COMMIT" --diff --binary "$(which clang-format-8)"
           echo "$RESULT_OUTPUT"
           exit 1
         fi