Bump codecov/codecov-action from 5.1.2 to 5.4.2

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 5.1.2 to 5.4.2.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v5.1.2...v5.4.2)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-version: 5.4.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/coverage.yml

@@ -29,7 +29,7 @@ jobs:
       run: go test -coverpkg="github.com/gdamore/tcell/v2/..." -covermode=count -coverprofile="coverage.txt" ./...
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v5.1.2
+      uses: codecov/codecov-action@v5.4.2
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         file: ./coverage.txt