fix cpp-linter for missing header files

Author: wgtmac

.github/workflows/cpp-linter.yml

@@ -53,6 +53,7 @@ jobs:
           thread-comments: true
           ignore: 'build|cmake_modules|ci'
           database: build
+          extra-args: '-I/src'
       - name: Fail fast?!
         if: steps.linter.outputs.checks-failed != 0
         run: |