ci: bump codecov/codecov-action from v1.2.0 to v1.2.1 (#488)

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>

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

.github/workflows/test.yml

@@ -56,6 +56,6 @@ jobs:
           name: coverage-${{ matrix.os }}
           path: coverage
 
-      - uses: codecov/codecov-action@v1.2.0
+      - uses: codecov/codecov-action@v1.2.1
         with:
           token: ${{ secrets.CODECOV_TOKEN }}