Ordinals founder: Version 0.21.2 fixes the problem that may cause rune loss, users are advised to upgrade

Casey, the founder of Ordinals, stated on X platform that if users send runes using ord, they should upgrade to ord 0.21.2. This version fixes a somewhat serious bug where "ord wallet send" would not create change outputs in certain cases, which could result in the loss of runes. This error has been fixed in this PR. When using "ord wallet send", the wallet must select input UTXOs containing enough runes to cover the amount sent. This release also includes: ord wallet sign, which can be used to sign messages with an address from the wallet; if forging is currently open, forging progress is only displayed on /rune; and forging progress was also not displaying correctly, but has now been fixed.