Bump eslint-config-prettier from 6.14.0 to 8.1.0 in /frontend

Bumps [eslint-config-prettier](https://github.com/prettier/eslint-config-prettier) from 6.14.0 to 8.1.0.
- [Release notes](https://github.com/prettier/eslint-config-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-config-prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/eslint-config-prettier@v6.14.0...v8.1.0)

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

frontend/package.json

@@ -61,7 +61,7 @@
     "babel-plugin-macros": "^3.0.1",
     "clean-webpack-plugin": "^3.0.0",
     "eslint": "^7.11.0",
-    "eslint-config-prettier": "^6.14.0",
+    "eslint-config-prettier": "^8.1.0",
     "eslint-config-standard": "^14.1.1",
     "eslint-plugin-import": "^2.22.1",
     "eslint-plugin-jest": "^24.1.0",