Bump eslint from 8.56.0 to 9.15.0 in /ui/react-app

Bumps [eslint](https://github.com/eslint/eslint) from 8.56.0 to 9.15.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v8.56.0...v9.15.0)

---
updated-dependencies:
- dependency-name: eslint
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

ui/react-app/package.json

@@ -28,7 +28,7 @@
     "css-loader": "^7.1.2",
     "dotenv-defaults": "^5.0.2",
     "esbuild-loader": "^2.20.0",
-    "eslint": "^8.56.0",
+    "eslint": "^9.15.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-import": "^2.31.0",
     "eslint-plugin-jsx-a11y": "^6.10.2",