fix(deps): bump vuetify from 2.6.8 to 2.6.9 in /frontend (#1543)

Bumps [vuetify](https://github.com/vuetifyjs/vuetify/tree/HEAD/packages/vuetify) from 2.6.8 to 2.6.9.
- [Release notes](https://github.com/vuetifyjs/vuetify/releases)
- [Commits](https://github.com/vuetifyjs/vuetify/commits/v2.6.9/packages/vuetify)

---
updated-dependencies:
- dependency-name: vuetify
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

frontend/package.json

@@ -30,7 +30,7 @@
     "nuxt": "^2.15.8",
     "v-jsoneditor": "^1.4.5",
     "vuedraggable": "^2.24.3",
-    "vuetify": "^2.6.8"
+    "vuetify": "^2.6.9"
   },
   "devDependencies": {
     "@babel/eslint-parser": "^7.18.9",