Update `Japanese` translation

Currently translated at 25.1% (136 of 540 strings)

Translation: Wiki-Bot/Discord
Translate-URL: https://weblate.frisk.space/projects/wiki-bot/discord/ja/

i18n/ja.json

@@ -77,28 +77,28 @@
         ],
         "random": [
             "ランダム",
-            " 🎲",
+            " ",
             " ",
             " ",
             " "
         ],
         "search": [
             "検索",
-            "サーチ ",
+            "サーチ",
             " ",
             " ",
             " "
         ],
         "test": [
             "テスト",
-            "検証 ",
+            "検証",
             " ",
             " ",
             " "
         ],
         "user": [
             "ユーザー",
-            "利用者 ",
+            "利用者",
             " ",
             " ",
             " "