Bump vue-i18n from 8.25.1 to 8.26.2 in /frontend

Bumps [vue-i18n](https://github.com/kazupon/vue-i18n) from 8.25.1 to 8.26.2.
- [Release notes](https://github.com/kazupon/vue-i18n/releases)
- [Changelog](https://github.com/kazupon/vue-i18n/blob/v8.x/CHANGELOG.md)
- [Commits](https://github.com/kazupon/vue-i18n/compare/v8.25.1...v8.26.2)

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

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

frontend/package.json

@@ -14,7 +14,7 @@
     "socket.io-client": "^4.2.0",
     "vue": "^2.6.14",
     "vue-clipboard2": "^0.3.3",
-    "vue-i18n": "^8.25.1",
+    "vue-i18n": "^8.26.2",
     "vue-router": "^3.5.2",
     "vue-socket.io": "^3.0.10"
   },

frontend/yarn.lock

@@ -8774,10 +8774,10 @@ vue-hot-reload-api@^2.3.0:
   resolved "https://registry.npm.taobao.org/vue-hot-reload-api/download/vue-hot-reload-api-2.3.4.tgz#532955cc1eb208a3d990b3a9f9a70574657e08f2"
   integrity sha1-UylVzB6yCKPZkLOp+acFdGV+CPI=
 
-vue-i18n@^8.25.1:
-  version "8.25.1"
-  resolved "https://registry.yarnpkg.com/vue-i18n/-/vue-i18n-8.25.1.tgz#63e4111ff50269c8ae91e7f0f73373198a81a0fc"
-  integrity sha512-UgvN6LxcANSG2O/i8draincxY3E/2bppMNN0szVinN7tuzSJdNFQdB9VDVaQcR1i8BprK9ISUAgZVZacsl+Zbw==
+vue-i18n@^8.26.2:
+  version "8.26.2"
+  resolved "https://registry.yarnpkg.com/vue-i18n/-/vue-i18n-8.26.2.tgz#86a1ab9330bae7a56f58f23a52355f68aad00222"
+  integrity sha512-koaC7gEYcedlzq9M8usTbD/v3DdLZ8suvwuanrs6aBIiM/sVqq2nQPbeuNPrpHaXgpR/pff2+/R+lFGKl7S1cQ==
 
 "vue-loader-v16@npm:vue-loader@^16.1.0":
   version "16.2.0"