Bump codecov/codecov-action from 3.1.4 to 3.1.6

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3.1.4 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](https://github.com/codecov/codecov-action/compare/v3.1.4...v3.1.6)

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

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

.github/workflows/coverage.yaml

@@ -44,4 +44,4 @@ jobs:
         run: cargo llvm-cov report --lcov --ignore-filename-regex '.*(tests).*|benches.rs|gencode|helpers.rs' --output-path lcov.info
 
       - name: Upload coverage report to Codecov
-        uses: codecov/codecov-action@v3.1.4
+        uses: codecov/codecov-action@v3.1.6