Merge pull request #444 from jupyterhub/dependabot/github_actions/codecov/codecov-action-4

build(deps): bump codecov/codecov-action from 3 to 4

Author: consideRatio

.github/workflows/test.yaml

@@ -162,6 +162,6 @@ jobs:
             ./build/robot
 
       # GitHub action reference: https://github.com/codecov/codecov-action
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
           directory: build/.coverage