Merge pull request #2003 from teojgo/ci/codecov_action_token

[ci] Add the codecov upload token to the github action

Author: Theofilos Manitaras

.github/workflows/main.yml

@@ -31,6 +31,7 @@ jobs:
       if:  matrix.python-version == '3.8'
       uses: codecov/codecov-action@v1
       with:
+        token: ${{ secrets.CODECOV_TOKEN }}
         fail_ci_if_error: true
 
   modulestest: