Merge bitcoin/bitcoin#31264: doc: Fixup bitcoin-wallet manpage chain selection args

fa729ab doc: Fixup bitcoin-wallet manpage chain selection args (MarcoFalke)

Pull request description:

  The sentence is missing `-testnet4` and `-chain`. Instead of duplicating the full list (and having to keep it in sync), just refer to them as `(test)chain selection arguments`.

ACKs for top commit:
  willcl-ark:
    utACK fa729ab
  tdb3:
    Code Review ACK fa729ab
  rkrux:
    crACK fa729ab

Tree-SHA512: e2cb6e2dd778a34e6c7e8ccde9794ab601e68bad68fe110f41cd73ac12ac3c5d0632fb59a48355f03ef0909f77ec5afd7ea50f301a998cb3ec76e115969f3e7e

Author: fanquake

src/bitcoin-wallet.cpp

@@ -1,4 +1,4 @@
-// Copyright (c) 2016-2022 The Bitcoin Core developers
+// Copyright (c) 2016-present The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -69,7 +69,7 @@ static std::optional<int> WalletAppInit(ArgsManager& args, int argc, char* argv[
             strUsage += "\n"
                 "bitcoin-wallet is an offline tool for creating and interacting with " CLIENT_NAME " wallet files.\n\n"
                 "By default bitcoin-wallet will act on wallets in the default mainnet wallet directory in the datadir.\n\n"
-                "To change the target wallet, use the -datadir, -wallet and -regtest / -signet / -testnet arguments.\n"
+                "To change the target wallet, use the -datadir, -wallet and (test)chain selection arguments.\n"
                 "\n"
                 "Usage: bitcoin-wallet [options] <command>\n"
                 "\n";