Merge pull request #851 from pangeo-data/dependabot/github_actions/codecov/codecov-action-4

Author: dependabot[bot]

.github/workflows/climpred_testing.yml

@@ -121,7 +121,7 @@ jobs:
         run: |
           pytest -n 4 --durations=20 --cov=climpred --cov-report=xml
       - name: Upload coverage to codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           file: ./coverage.xml