chore(deps-dev): bump eslint-plugin-prettier in /frontend

Bumps [eslint-plugin-prettier](https://github.com/prettier/eslint-plugin-prettier) from 4.0.0 to 4.2.1.
- [Release notes](https://github.com/prettier/eslint-plugin-prettier/releases)
- [Changelog](https://github.com/prettier/eslint-plugin-prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/eslint-plugin-prettier@v4.0.0...v4.2.1)

---
updated-dependencies:
- dependency-name: eslint-plugin-prettier
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

frontend/package.json

@@ -92,7 +92,7 @@
     "eslint-plugin-ember": "10.5.8",
     "eslint-plugin-import": "2.25.3",
     "eslint-plugin-node": "11.1.0",
-    "eslint-plugin-prettier": "4.0.0",
+    "eslint-plugin-prettier": "4.2.1",
     "eslint-plugin-qunit": "^7.2.0",
     "file-saver": "^2.0.5",
     "husky": "^7.0.4",

frontend/yarn.lock

@@ -6972,7 +6972,7 @@ [email protected]:
     rimraf "^3.0.1"
     semver "^5.5.0"
 
-ember-cli-babel@^6.3.0, ember-cli-babel@^6.6.0:
+ember-cli-babel@^6.3.0:
   version "6.18.0"
   resolved "https://registry.yarnpkg.com/ember-cli-babel/-/ember-cli-babel-6.18.0.tgz#3f6435fd275172edeff2b634ee7b29ce74318957"
   integrity sha512-7ceC8joNYxY2wES16iIBlbPSxwKDBhYwC8drU3ZEvuPDMwVv1KzxCNu1fvxyFEBWhwaRNTUxSCsEVoTd9nosGA==
@@ -7635,12 +7635,6 @@ ember-maybe-import-regenerator@^1.0.0:
     ember-cli-babel "^7.26.6"
     regenerator-runtime "^0.13.2"
 
-ember-model-namespaces@adfinis-sygroup/ember-model-namespaces:
-  version "0.0.0"
-  resolved "https://codeload.github.com/adfinis-sygroup/ember-model-namespaces/tar.gz/559fa0f82ca9c675934abe0eaed28ee8a074bfb7"
-  dependencies:
-    ember-cli-babel "^6.6.0"
-
 ember-modifier-manager-polyfill@^1.2.0:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/ember-modifier-manager-polyfill/-/ember-modifier-manager-polyfill-1.2.0.tgz#cf4444e11a42ac84f5c8badd85e635df57565dda"
@@ -8203,10 +8197,10 @@ [email protected]:
     resolve "^1.10.1"
     semver "^6.1.0"
 
-eslint-plugin-prettier@4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-4.0.0.tgz#8b99d1e4b8b24a762472b4567992023619cb98e0"
-  integrity sha512-98MqmCJ7vJodoQK359bqQWaxOE0CS8paAz/GgjaZLyex4TTk3g9HugoO89EqWCrFiOqn9EVvcoo7gZzONCWVwQ==
+eslint-plugin-prettier@4.2.1:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-prettier/-/eslint-plugin-prettier-4.2.1.tgz#651cbb88b1dab98bfd42f017a12fa6b2d993f94b"
+  integrity sha512-f/0rXLXUt0oFYs8ra4w49wYZBG5GKZpAYsJSm6rnYL5uVDjd+zowwMwVZHnAjf4edNrKpCDYfXDgmRE/Ak7QyQ==
   dependencies:
     prettier-linter-helpers "^1.0.0"