gdextension: Sync with upstream commit 03afb92efa18874da19f7fc185a32c005d20aa1d (4.3-rc3)

gdextension/extension_api.json

@@ -3,9 +3,9 @@
 		"version_major": 4,
 		"version_minor": 3,
 		"version_patch": 0,
-		"version_status": "rc2",
+		"version_status": "rc3",
 		"version_build": "official",
-		"version_full_name": "Godot Engine v4.3.rc2.official"
+		"version_full_name": "Godot Engine v4.3.rc3.official"
 	},
 	"builtin_class_sizes": [
 		{