deps(ci): bump codecov/codecov-action from 5.3.1 to 5.4.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 5.3.1 to 5.4.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v5.3.1...v5.4.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci-test.yaml

@@ -91,7 +91,7 @@ jobs:
             ${{ env.OASIS_NODE_DATADIR }}/fixture.json
 
       - name: Upload to codecov.io
-        uses: codecov/codecov-action@v5.3.1
+        uses: codecov/codecov-action@v5.4.0
 
   test-go-c10l:
     runs-on: ubuntu-latest
@@ -171,4 +171,4 @@ jobs:
             ${{ env.OASIS_NODE_DATADIR }}/fixture.json
 
       - name: Upload to codecov.io
-        uses: codecov/codecov-action@v5.3.1
+        uses: codecov/codecov-action@v5.4.0