deps(ci): bump codecov/codecov-action from 5.0.3 to 5.0.6

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 5.0.3 to 5.0.6.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v5.0.3...v5.0.6)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci-test.yaml

@@ -90,7 +90,7 @@ jobs:
             ${{ env.OASIS_NODE_DATADIR }}/fixture.json
 
       - name: Upload to codecov.io
-        uses: codecov/[email protected].3
+        uses: codecov/[email protected].6
 
   test-go-c10l:
     runs-on: ubuntu-latest
@@ -169,4 +169,4 @@ jobs:
             ${{ env.OASIS_NODE_DATADIR }}/fixture.json
 
       - name: Upload to codecov.io
-        uses: codecov/[email protected].3
+        uses: codecov/[email protected].6