Bump codecov/codecov-action from 1 to 2.1.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 1 to 2.1.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v1...v2.1.0)

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

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

Author: dependabot[bot]

.github/workflows/ci-tests.yml

@@ -58,7 +58,7 @@ jobs:
 
       - name: Upload coverage to Codecov
         if: ${{ matrix.step == 'unit' }}
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v2.1.0
         with:
           fail_ci_if_error: true
   test-aarch64: