Update ja.rs and Add "About Rustdesk" (#8784)

* Update ja.rs

Signed-off-by: creeper-0910 <56744841+creeper-0910@users.noreply.github.com>

* Update ja.rs

Signed-off-by: creeper-0910 <56744841+creeper-0910@users.noreply.github.com>

* Add 'About RustDesk'

Signed-off-by: creeper-0910 <56744841+creeper-0910@users.noreply.github.com>

---------

Signed-off-by: creeper-0910 <56744841+creeper-0910@users.noreply.github.com>

src/lang/tw.rs

@@ -629,5 +629,6 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("enable-bot-desc", "1. 開啟與 @BotFather 的對話。\n2. 傳送指令 \"/newbot\"。 您將會在完成此步驟後收到權杖 (Token)。\n3. 開始與您剛創立的機器人的對話。 傳送一則以正斜槓 (\"/\") 開頭的訊息來啟用它，例如 \"/hello\"。"),
         ("cancel-2fa-confirm-tip", "確定要取消二步驟驗證嗎？"),
         ("cancel-bot-confirm-tip", "確定要取消 Telegram 機器人嗎？"),
+        ("About RustDesk", ""),
     ].iter().cloned().collect();
 }