Test codecov-action@v4

Signed-off-by: Beat Buesser <[email protected]>

Author: beat-buesser

.github/workflows/ci-scikit-learn.yml

@@ -17,7 +17,7 @@ on:
       - main
       - dev*
 
-  # Run scheduled CI flow daily - test codecov 2
+  # Run scheduled CI flow daily
   schedule:
     - cron: '0 8 * * 0'