Skip codecov uploads in scheduled daily tests (#778)

We can only upload a limited number of coverage reports for any commit anyway,
this avoids turning these into test failures.

.github/workflows/ci-cd.yml

@@ -611,6 +611,7 @@ jobs:
       timeout-minutes: 6
 
     - name: Upload coverage
+      if: ${{ github.event_name != 'schedule' }}
       uses: codecov/[email protected]
       with:
         file: ./coverage.xml