Bump codecov/codecov-action from v1.2.0 to v1.2.1

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from v1.2.0 to v1.2.1.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v1.2.0...e156083)

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

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -92,4 +92,4 @@ jobs:
 
       - name: Upload coverage report
         if: always() && matrix.session == 'tests'
-        uses: codecov/codecov-action@v1.2.0
+        uses: codecov/codecov-action@v1.2.1