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](https://github.com/codecov/codecov-action/compare/v1.2.0...e156083f13aff6830c92fc5faa23505779fbf649)

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

.github/workflows/main.yml

@@ -69,7 +69,7 @@ jobs:
           version: '0.12.3'
           timeout: 300
       - name: Upload coverage report to Codecov
-        uses: codecov/codecov-action@v1.2.0
+        uses: codecov/codecov-action@v1.2.1
         with:
           token: ${{ secrets.CODECOV_TOKEN }}