Bump codecov/codecov-action from 5.1.2 to 5.3.1 (#554)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -50,7 +50,7 @@ jobs:
         run: |
           pytest -n auto --cov=./ --cov-report=xml
       - name: Upload code coverage to Codecov
-        uses: codecov/codecov-action@v5.1.2
+        uses: codecov/codecov-action@v5.3.1
         with:
           file: ./coverage.xml
           flags: unittests
@@ -114,7 +114,7 @@ jobs:
         run: |
           python -m mypy --install-types --non-interactive --cobertura-xml-report mypy_report cf_xarray/
       - name: Upload mypy coverage to Codecov
-        uses: codecov/codecov-action@v5.1.2
+        uses: codecov/codecov-action@v5.3.1
         with:
           file: mypy_report/cobertura.xml
           flags: mypy