Fixed /say command not allowing more than one argument

By: Dinnerbone <dinnerbone@dinnerbone.com>

paper-api/src/main/java/org/bukkit/command/defaults/SayCommand.java

@@ -16,7 +16,7 @@ public class SayCommand extends VanillaCommand {
     @Override
     public boolean execute(CommandSender sender, String currentAlias, String[] args) {
         if (!testPermission(sender)) return true;
-        if (args.length != 1)  {
+        if (args.length == 0)  {
             sender.sendMessage(ChatColor.RED + "Usage: " + usageMessage);
             return false;
         }