Support Codecov v4 changes (#245)

Pass `CODECOV_TOKEN` to shared workflow

Author: TheJulianJES

.github/workflows/ci.yml

@@ -13,3 +13,5 @@ jobs:
       PRE_COMMIT_CACHE_PATH:  ~/.cache/pre-commit
       PYTHON_VERSION_DEFAULT: 3.9.15
       MINIMUM_COVERAGE_PERCENTAGE: 95
+    secrets:
+      CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}