github: enable clang-format-action

Signed-off-by: Mikhail Koviazin <[email protected]>

.github/workflows/ci.yml

@@ -9,11 +9,12 @@ jobs:
   checkers:
     name: Run static checkers
     runs-on: ubuntu-latest
-    if: ${{ false }}  # Disabled until we have merged a formatted code base.
     steps:
     - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
     - name: Run clang-format style check (.c and .h)
       uses: jidicula/clang-format-action@c74383674bf5f7c69f60ce562019c1c94bc1421a # v4.13.0
+      with:
+        clang-format-version: '18'
 
   ubuntu:
     name: ${{ matrix.cmake-build-type }}-build [${{ matrix.compiler }}, cmake-${{ matrix.cmake-version }} sanitizer="${{ matrix.sanitizer }}"]