ci: fix clang-format

Author: futrime

.github/workflows/build.yml

@@ -59,5 +59,5 @@ jobs:
 
       - name: clang-format
         run: |
-          Get-ChildItem src/ -Filter *.cpp -Recurse | ForEach-Object { clang-format -i -Werror $_.FullName }
-          Get-ChildItem src/ -Filter *.h -Recurse | ForEach-Object { clang-format -i -Werror $_.FullName }
+          Get-ChildItem src/ -Filter *.cpp -Recurse | ForEach-Object { clang-format --dry-run -Werror $_.FullName }
+          Get-ChildItem src/ -Filter *.h -Recurse | ForEach-Object { clang-format --dry-run -Werror $_.FullName }