Small changes to japanese translation (#3620)

app/javascript/mastodon/locales/ja.json

@@ -75,7 +75,7 @@
   "getting_started.support": "{faq} • {userguide} • {apps}",
   "getting_started.userguide": "ユーザーガイド",
   "home.column_settings.advanced": "上級者向け",
-  "home.column_settings.basic": "シンプル",
+  "home.column_settings.basic": "基本設定",
   "home.column_settings.filter_regex": "正規表現でフィルター",
   "home.column_settings.show_reblogs": "ブースト表示",
   "home.column_settings.show_replies": "返信表示",
@@ -170,7 +170,7 @@
   "upload_area.title": "ドラッグ＆ドロップでアップロード",
   "upload_button.label": "メディアを追加",
   "upload_form.undo": "やり直す",
-  "upload_progress.label": "アップロード中…",
+  "upload_progress.label": "アップロード中...",
   "video_player.expand": "動画の詳細",
   "video_player.toggle_sound": "音の切り替え",
   "video_player.toggle_visible": "表示切り替え",