Adjust TODO link

Author: sipa

src/rpc/blockchain.cpp

@@ -2058,7 +2058,7 @@ UniValue scantxoutset(const JSONRPCRequest& request)
             "or more path elements separated by \"/\", and optionally ending in \"/*\" (unhardened), or \"/*'\" or \"/*h\" (hardened) to specify all\n"
             "unhardened or hardened child keys.\n"
             "In the latter case, a range needs to be specified by below if different from 1000.\n"
-            "For more information on output descriptors, see the documentation at TODO\n"
+            "For more information on output descriptors, see the documentation in the doc/descriptors.md file.\n"
             "\nArguments:\n"
             "1. \"action\"                       (string, required) The action to execute\n"
             "                                      \"start\" for starting a scan\n"