improve i18n

resource/locales/en_US/admin/admin.json

@@ -305,7 +305,7 @@
       "generate_access_token": "Generate Access Token",
       "register_for_growi_official_bot_proxy_service": "Register for GROWI Official Bot Proxy Service",
       "enter_growi_register_on_slack": "Enter `/growi register` on slack",
-      "paste_growi_url": "Since the modal is displayed, enter the following URL in <b> GROWI URL </b>.",
+      "paste_growi_url": "Since a modal is displayed, enter the following URL in <b>GROWI URL</b>.",
       "enter_access_token_for_growi_and_proxy": "Enter <b>Access Token for GROWI</b> and <b>Access Token for Proxy</b>",
       "set_proxy_url_on_growi": "Set Proxy URL on GROWI",
       "enter_proxy_url_and_update": "Enter <b>Proxy URL</b> shown on Slack and click Update",

resource/locales/ja_JP/admin/admin.json

@@ -302,7 +302,7 @@
       "generate_access_token": "Access Tokenの発行",
       "register_for_growi_official_bot_proxy_service": "GROWI Official Bot Proxy サービスへの登録",
       "enter_growi_register_on_slack": "Slack上で `/growi register` と打つ",
-      "paste_growi_url": "モーダルが表示されるので、<b>GROWI URL</b> には下記のURL入力します。",
+      "paste_growi_url": "モーダルが表示されるので、<b>GROWI URL</b> には下記のURLを入力します。",
       "enter_access_token_for_growi_and_proxy": "上記で発行した<b>Access Token for GROWI</b> と <b>Access Token for Proxy</b>を入れる",
       "set_proxy_url_on_growi": "ProxyのURLをGROWIに登録する",
       "enter_proxy_url_and_update": "Slack上に通知された<b>Proxy URL</b>を入力し、更新してください。",

resource/locales/zh_CN/admin/admin.json

@@ -312,7 +312,7 @@
       "generate_access_token": "生成Access Token",
       "register_for_growi_official_bot_proxy_service": "注册 GROWI Official Bot Proxy Service",
       "enter_growi_register_on_slack": "在Slack中，输入`/growi register`。",
-      "paste_growi_url": "由于显示了模式，请在<b> GROWI URL </b>中输入以下URL",
+      "paste_growi_url": "由于显示了模式，请在 <b>GROWI URL</b> 中输入以下URL",
       "enter_access_token_for_growi_and_proxy": "插入上面发出的 <b>Access Token for GROWI</b> 和 <b>Access Token for Proxy</b>。",
       "set_proxy_url_on_growi": "向GROWI注册Proxy的URL",
       "enter_proxy_url_and_update": "按照Slack上的通知输入并更新你的 <b>Proxy URL</b>。",