Update clang-format to v18

Author: dhebbeker

.github/workflows/clang-format-check.yml

@@ -14,6 +14,6 @@ jobs:
     - name: Run clang-format style check.
       uses: jidicula/clang-format-action@v4.11.0
       with:
-        clang-format-version: '17'
+        clang-format-version: '18'
         fallback-style: 'none'