build(deps): bump codecov/codecov-action from 3.1.1 to 3.1.6

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3.1.1 to 3.1.6.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@d9f34f8...ab904c4)

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

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

.github/workflows/coverage.yml

@@ -56,4 +56,4 @@ jobs:
         # Some tests are especially flakey in coverage tests. That's fine. We
         # only really care to measure how much of our codebase is covered.
         continue-on-error: true
-      - uses: codecov/codecov-action@d9f34f8cd5cb3b3eb79b3e4b5dae3a16df499a70
+      - uses: codecov/codecov-action@ab904c41d6ece82784817410c45d8b8c02684457