refactor(frontend): import宣言周りのエラーを修正 (#12773)

packages/frontend/src/pages/my-antennas/index.vue

@@ -32,7 +32,7 @@ import { onActivated, computed } from 'vue';
 import MkButton from '@/components/MkButton.vue';
 import { i18n } from '@/i18n.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
-import { antennasCache } from '@/cache';
+import { antennasCache } from '@/cache.js';
 import { infoImageUrl } from '@/instance.js';
 
 const antennas = computed(() => antennasCache.value.value ?? []);