Bump codecov/codecov-action from 2 to 5

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 2 to 5.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v2...v5)

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

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

.github/workflows/integration.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Integ ${{ matrix.cluster }} secured=${{ matrix.secured }} version=${{matrix.entry.opensearch_version}}
         run: "./.ci/run-tests ${{ matrix.cluster }} ${{ matrix.secured }} ${{ matrix.entry.opensearch_version }} test"
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v2
+        uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           files: ./junit/opensearch-py-ml-codecov.xml