chore(deps): bump vue from 2.7.16 to 3.5.21 in /www/webapp

Bumps [vue](https://github.com/vuejs/core) from 2.7.16 to 3.5.21.
- [Release notes](https://github.com/vuejs/core/releases)
- [Changelog](https://github.com/vuejs/core/blob/main/CHANGELOG.md)
- [Commits](https://github.com/vuejs/core/commits/v3.5.21)

---
updated-dependencies:
- dependency-name: vue
  dependency-version: 3.5.21
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

www/webapp/package.json

@@ -19,7 +19,7 @@
     "axios": "^1.4.0",
     "date-fns": "^4.1.0",
     "pinia": "^2.0.30",
-    "vue": "~2.7.14",
+    "vue": "~3.5.21",
     "vue-router": "~3.6.5",
     "vuelidate": "^0.7.7",
     "vuetify": "^2.7.0"