build(deps-dev): bump prettier in /superset-websocket

Bumps [prettier](https://github.com/prettier/prettier) from 2.8.7 to 2.8.8.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@2.8.7...2.8.8)

---
updated-dependencies:
- dependency-name: prettier
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

superset-websocket/package.json

@@ -36,7 +36,7 @@
     "eslint": "^8.38.0",
     "eslint-config-prettier": "^8.8.0",
     "jest": "^27.3.1",
-    "prettier": "^2.8.7",
+    "prettier": "^2.8.8",
     "ts-jest": "^27.0.7",
     "ts-node": "^10.9.1",
     "typescript": "^4.9.5"