Bump vue-i18n from 11.1.3 to 11.1.9 in /webapp

Bumps [vue-i18n](https://github.com/intlify/vue-i18n/tree/HEAD/packages/vue-i18n) from 11.1.3 to 11.1.9.
- [Release notes](https://github.com/intlify/vue-i18n/releases)
- [Changelog](https://github.com/intlify/vue-i18n/blob/master/CHANGELOG.md)
- [Commits](https://github.com/intlify/vue-i18n/commits/v11.1.9/packages/vue-i18n)

---
updated-dependencies:
- dependency-name: vue-i18n
  dependency-version: 11.1.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

webapp/package.json

@@ -20,7 +20,7 @@
     "sortablejs": "^1.15.6",
     "spark-md5": "^3.0.2",
     "vue": "^3.5.13",
-    "vue-i18n": "11.1.3",
+    "vue-i18n": "11.1.9",
     "vue-router": "^4.5.1"
   },
   "devDependencies": {