enhance(frontend): URL入力フォームのtypeをurlに

Resolve #12137

packages/frontend/src/pages/admin/object-storage.vue

@@ -12,7 +12,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<MkSwitch v-model="useObjectStorage">{{ i18n.ts.useObjectStorage }}</MkSwitch>
 
 				<template v-if="useObjectStorage">
-					<MkInput v-model="objectStorageBaseUrl" :placeholder="'https://example.com'">
+					<MkInput v-model="objectStorageBaseUrl" :placeholder="'https://example.com'" type="url">
 						<template #label>{{ i18n.ts.objectStorageBaseUrl }}</template>
 						<template #caption>{{ i18n.ts.objectStorageBaseUrlDesc }}</template>
 					</MkInput>