Keep codecov-action at v3

Co-authored-by: Christian Clauss <[email protected]>

Author: Saransh-cpp

.github/workflows/ci.yml

@@ -50,4 +50,4 @@ jobs:
         run: pytest --cov=removestar . -vv
 
       - name: Upload coverage report
-        uses: codecov/codecov-action@v5.1.1
+        uses: codecov/codecov-action@v3.1.4