message: Add example 2nd arg to signrawtransactionwithkey
  The RPC examples for signrawtransactionwithkey are missing the 2nd parameter.
  Github-Pull:
  Rebased-From:
diff: @@ -996,8 +996,8 @@ static UniValue signrawtransactionwithkey(const JSONRPCRequest& request)
  "}\n"
  },
  RPCExamples{
  - HelpExampleCli("signrawtransactionwithkey", "\"myhex\"")
  - + HelpExampleRpc("signrawtransactionwithkey", "\"myhex\"")
  + HelpExampleCli("signrawtransactionwithkey", "\"myhex\" \"[\\\"key1\\\",\\\"key2\\\"]\"")
  + + HelpExampleRpc("signrawtransactionwithkey", "\"myhex\", \"[\\\"key1\\\",\\\"key2\\\"]\"")
  },
  }.ToString());
  