ci: bump codecov/codecov-action from v1.0.14 to v1.0.15 (#353)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from v1.0.14 to v1.0.15.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Commits](codecov/codecov-action@v1.0.14...239febf)

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

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

.github/workflows/test.yml

@@ -60,6 +60,6 @@ jobs:
           name: coverage-${{ matrix.os }}
           path: coverage
 
-      - uses: codecov/codecov-action@v1.0.14
+      - uses: codecov/codecov-action@v1.0.15
         with:
           token: ${{ secrets.CODECOV_TOKEN }}