exclude files from the coveralls.

These files are internal only. Not tested.

mocksdkwrapper.hpp
pico_sdk_apistub.cpp

Author: suikan4github

.github/workflows/ctest.yaml

@@ -76,4 +76,4 @@ jobs:
         uses: threeal/gcovr-action@v1.1.0
         with:
           coveralls-send: true
-          excludes:  build/* test/* 
+          excludes:  build/* test/* mocksdkwrapper.hpp pico_sdk_apistub.cpp