revert const

Author: hazelnutcloud

godot/addons/godot-llama-cpp/autoloads/llama-backend.gd

@@ -1,7 +1,7 @@
 # This script will be autoloaded by the editor plugin
 extends Node
 
-const backend: LlamaBackend = LlamaBackend.new()
+var backend: LlamaBackend = LlamaBackend.new()
 
 func _enter_tree() -> void:
   backend.init()