Merge bitcoin#31416: doc: Fix incorrect send RPC docs

fad83e7 doc: Fix incorrect send RPC docs (MarcoFalke)

Pull request description:

  It would be good to have accurate RPC docs, so that humans and machines can read them and rely on them.

  This fixes one issue.

ACKs for top commit:
  fjahr:
    utACK fad83e7
  rkrux:
    tACK fad83e7
  luke-jr:
    tACK fad83e7

Tree-SHA512: 65d0cc18a62ef44833621464d74b743d24ffe2b853596dce2c4f423df0495142d50387c02ba1b54f5ca77d4ddb083d55116a8ac92698aa6558762d841664911e

Author: fanquake

src/wallet/rpc/spend.cpp

@@ -1226,16 +1226,18 @@ RPCHelpMan send()
                     {"include_watching", RPCArg::Type::BOOL, RPCArg::DefaultHint{"true for watch-only wallets, otherwise false"}, "Also select inputs which are watch only.\n"
                                           "Only solvable inputs can be used. Watch-only destinations are solvable if the public key and/or output script was imported,\n"
                                           "e.g. with 'importpubkey' or 'importmulti' with the 'pubkeys' or 'desc' field."},
-                    {"inputs", RPCArg::Type::ARR, RPCArg::Default{UniValue::VARR}, "Specify inputs instead of adding them automatically. A JSON array of JSON objects",
+                    {"inputs", RPCArg::Type::ARR, RPCArg::Default{UniValue::VARR}, "Specify inputs instead of adding them automatically.",
                         {
+                          {"", RPCArg::Type::OBJ, RPCArg::Optional::OMITTED, "", {
                             {"txid", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The transaction id"},
                             {"vout", RPCArg::Type::NUM, RPCArg::Optional::NO, "The output number"},
-                            {"sequence", RPCArg::Type::NUM, RPCArg::Optional::NO, "The sequence number"},
+                            {"sequence", RPCArg::Type::NUM, RPCArg::DefaultHint{"depends on the value of the 'replaceable' and 'locktime' arguments"}, "The sequence number"},
                             {"weight", RPCArg::Type::NUM, RPCArg::DefaultHint{"Calculated from wallet and solving data"}, "The maximum weight for this input, "
                                         "including the weight of the outpoint and sequence number. "
                                         "Note that signature sizes are not guaranteed to be consistent, "
                                         "so the maximum DER signatures size of 73 bytes should be used when considering ECDSA signatures."
                                         "Remember to convert serialized sizes to weight units when necessary."},
+                          }},
                         },
                     },
                     {"locktime", RPCArg::Type::NUM, RPCArg::Default{0}, "Raw locktime. Non-0 value also locktime-activates inputs"},