[godot] Set batching buffer to max in example project.

spine-godot/example/project.godot

@@ -29,6 +29,7 @@ quality/driver/driver_name="GLES2"
 vram_compression/import_etc=true
 vram_compression/import_etc2=false
 batching/parameters/max_join_item_commands=100
+batching/parameters/batch_buffer_size=65535
 batching/parameters/item_reordering_lookahead=100
 batching/debug/diagnose_frame=true
 environment/default_environment="res://default_env.tres"