Bump codecov/codecov-action from 4.5.0 to 4.6.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 4.5.0 to 4.6.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v4.5.0...v4.6.0)

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

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

Author: dependabot[bot]

.github/workflows/coverage.yaml

@@ -17,6 +17,6 @@ jobs:
       - run: flutter test --coverage
 
       - name: Upload coverage reports to Codecov
-        uses: codecov/codecov-action@v4.5.0
+        uses: codecov/codecov-action@v4.6.0
         with:
           token: ${{ secrets.CODECOV_TOKEN }}