Bump codecov/codecov-action from 3.1.5 to 4.0.1 (#3066)

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -73,4 +73,4 @@ jobs:
 
     - name: Upload coverage to Codecov
       if: ${{ matrix.update-coverage }}
-      uses: codecov/codecov-action@4fe8c5f003fae66aa5ebb77cfd3e7bfbbda0b6b0 #v3.1.5
+      uses: codecov/codecov-action@e0b68c6749509c5f83f984dd99a76a1c1a231044 #v4.0.1