Bump codecov/codecov-action from 3.1.1 to 3.1.2 (ros-controls#992)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3.1.1...v3.1.2)

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

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-coverage-build.yml

@@ -44,7 +44,7 @@ jobs:
               }
             }
           colcon-mixin-repository: https://raw.githubusercontent.com/colcon/colcon-mixin-repository/master/index.yaml
-      - uses: codecov/[email protected].1
+      - uses: codecov/[email protected].2
         with:
           file: ros_ws/lcov/total_coverage.info
           flags: unittests