remove test utils from coverage

Author: Remi-Gau

.github/workflows/moxunit.yml

@@ -31,7 +31,8 @@ jobs:
       uses: joergbrech/[email protected]
       with:
         tests: tests
-        src: src tests/utils
+        src: src 
+        ext: tests/utils
         with_coverage: true
         cover_xml_file: coverage.xml