do not fail CI when coverage cannot be uploaded (#129)

Author: Remi-Gau

.github/workflows/test_and_coverage.yml

@@ -45,5 +45,5 @@ jobs:
                 file: ./coverage.xml
                 flags: tests
                 name: codecov-umbrella
-                fail_ci_if_error: true
+                fail_ci_if_error: false
                 token: ${{ secrets.CODECOV_TOKEN }}