Update codecov CI configuration to fix PR coverage uploads (#2022)

* update codecov upload action from v3 to v4 to support tokenless upload for forks: https://docs.codecov.com/docs/codecov-uploader#supporting-token-less-uploads-for-forks-of-open-source-repos-using-codecov

Author: kandersolar

.github/workflows/pytest-remote-data.yml

@@ -104,7 +104,7 @@ jobs:
 
       - name: Upload coverage to Codecov
         if: matrix.python-version == 3.7 && matrix.suffix == ''
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           fail_ci_if_error: true
           verbose: true

.github/workflows/pytest.yml

@@ -83,7 +83,7 @@ jobs:
 
       - name: Upload coverage to Codecov
         if: matrix.python-version == 3.7 && matrix.suffix == '' && matrix.os == 'ubuntu-latest' && matrix.environment-type == 'conda'
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           fail_ci_if_error: true
           verbose: true