message: fix walletpassphrase rpc
diff: @@ -21,7 +21,10 @@ RPCHelpMan walletpassphrase()
  {"timeout", RPCArg::Type::NUM, RPCArg::Optional::NO, "The time to keep the decryption key in seconds; capped at 100000000 (~3 years)."},
  {"mintonly", RPCArg::Type::BOOL, RPCArg::Optional::OMITTED, "Unlock for minting only"},
  },
  - RPCResult{RPCResult::Type::NONE, "", ""},
  + RPCResult{RPCResult::Type::OBJ, "", "",
  + {
  + {RPCResult::Type::BOOL, "unlocked_minting_only", "Whether wallet is unlocked for minting only."}
  + }},
  RPCExamples{
  "\nUnlock the wallet for 60 seconds\n"
  + HelpExampleCli("walletpassphrase", "\"my pass phrase\" 60, false") +
  