Fix /qs taxaccount <uuid/name> use wrong string

Author: Ghost-chu

src/main/java/org/maxgamer/quickshop/command/subcommand/SubCommand_TaxAccount.java

@@ -56,7 +56,7 @@ public void onCommand(@NotNull Player sender, @NotNull String commandLabel, @Not
                 } else {
                     shop.setTaxAccount(Bukkit.getOfflinePlayer(cmdArg[0]).getUniqueId());
                 }
-                plugin.text().of(sender, "taxaccount-unset", cmdArg[0]).send();
+                plugin.text().of(sender, "taxaccount-set", cmdArg[0]).send();
                 return;
             }
         }