Merge #33484: doc: rpc: fix case typo in finalizepsbt help (final_scriptwitness)

ff05beb doc: rpc: fix case typo in `finalizepsbt` help (final_scriptwitness) (Sebastian Falbesoner)

Pull request description:

  The lower-case spelling matches the `decodepsbt` result field:
  https://github.com/bitcoin/bitcoin/blob/200150beba6601237036bc01ee10f6a0a2246c3d/src/rpc/rawtransaction.cpp#L871
  https://github.com/bitcoin/bitcoin/blob/200150beba6601237036bc01ee10f6a0a2246c3d/src/rpc/rawtransaction.cpp#L1253

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Tree-SHA512: c0a0e29e95fed3fcee4df4f3fc87b32774d76bebadcda5aa010bc45142727536d6a71e4c0e70564db8bdb734e8647c80953793ac9ecd6c434345e972f8d9b7b0

Author: fanquake

src/rpc/rawtransaction.cpp

@@ -1608,7 +1608,7 @@ static RPCHelpMan finalizepsbt()
     return RPCHelpMan{"finalizepsbt",
                 "Finalize the inputs of a PSBT. If the transaction is fully signed, it will produce a\n"
                 "network serialized transaction which can be broadcast with sendrawtransaction. Otherwise a PSBT will be\n"
-                "created which has the final_scriptSig and final_scriptWitness fields filled for inputs that are complete.\n"
+                "created which has the final_scriptSig and final_scriptwitness fields filled for inputs that are complete.\n"
                 "Implements the Finalizer and Extractor roles.\n",
                 {
                     {"psbt", RPCArg::Type::STR, RPCArg::Optional::NO, "A base64 string of a PSBT"},