robo(ci): bump codecov/codecov-action from 2 to 3

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 2 to 3.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@v2...v3)

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

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

.github/workflows/coverage.yml

@@ -29,7 +29,7 @@ jobs:
           args: '-- --test-threads 1'
 
       - name: Upload to codecov.io
-        uses: codecov/codecov-action@v2
+        uses: codecov/codecov-action@v3
 
       - name: Archive code coverage results
         uses: actions/upload-artifact@v3