fix: make codecov upload non-blocking temporarily

- Set fail_ci_if_error to false
- Add continue-on-error to prevent CI failure
- Allows CI to pass while CODECOV_TOKEN secret is being configured

Author: rschumann

.github/workflows/ci.yml

@@ -54,7 +54,8 @@ jobs:
       with:
         file: ./coverage/lcov.info
         token: ${{ secrets.CODECOV_TOKEN }}
-        fail_ci_if_error: true
+        fail_ci_if_error: false
+      continue-on-error: true
 
   security:
     runs-on: ubuntu-latest