adjust source instead of adding exclude for clang-format

Author: aobolensk

.github/workflows/ci.yml

@@ -14,8 +14,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: DoozyX/clang-format-lint-action@v0.15
       with:
-        source: '.'
-        exclude: '.git'
+        source: './app ./include ./src ./test'
   build-linux:
     strategy:
       matrix: