Merge pull request #306 from cta-observatory/dependabot/github_actions/codecov/codecov-action-4

Bump codecov/codecov-action from 3 to 4

Author: Daniel Morcuende

.github/workflows/ci.yml

@@ -90,5 +90,5 @@ jobs:
           cat coverage.xml
 
       - name: Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         if: contains(matrix.extra-args, 'codecov')