Update clang_format.yml

.github/workflows/clang_format.yml

@@ -14,18 +14,14 @@ jobs:
   format:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           # check out HEAD on the branch
           ref: ${{ github.head_ref }}
+          repository: ${{ github.event.pull_request.head.repo.full_name }}
           # make sure the parent commit is grabbed as well, because
           # that's what will get formatted (i.e. the most recent commit)
           fetch-depth: 2
-      # format the latest commit
-      - uses: purduesigbots/clang-format-action@1
-        # use one of clang-format's supported styles or leave this out to use the style in your .clang-format file
-        with:
-          style: file
       # commit the changes (if there are any)
       - name: Commit changes
         uses: stefanzweifel/git-auto-commit-action@v4.1.2