Change renderer to Forward+

Matches what I see in Project Settings > Rendering > Renderer. Other
demos seem to be making this change and I think the project converter
modified this setting.

Author: idbrii

Diff for: 2d/skeleton/README.md

@@ -6,7 +6,7 @@ there is a simple character controller that controls the animations.
 
 Language: GDScript
 
-Renderer: GLES 2
+Renderer: Forward+
 
 Check out this demo on the asset library: https://godotengine.org/asset-library/asset/1027