Bump codecov/codecov-action from 3 to 4 (open-telemetry#2519)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3 to 4.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -854,7 +854,7 @@ jobs:
         CXX: /usr/bin/g++-10
       run: ./ci/do_ci.sh code.coverage
     - name: upload report
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         file: /home/runner/build/coverage.info