Fix malformed doc after #15611

doc/classes/@GlobalScope.xml

@@ -29,6 +29,9 @@
 		<member name="Geometry" type="Geometry" setter="" getter="">
 			[Geometry] singleton
 		</member>
+		<member name="GodotSharp" type="GodotSharp" setter="" getter="">
+			[GodotSharp] singleton
+		</member>
 		<member name="IP" type="IP" setter="" getter="">
 			[IP] singleton
 		</member>

doc/classes/SceneTree.xml

@@ -1,4 +1,4 @@
-xml version="1.0" encoding="UTF-8" ?>
+<?xml version="1.0" encoding="UTF-8" ?>
 <class name="SceneTree" inherits="MainLoop" category="Core" version="3.0-beta">
 	<brief_description>
 	</brief_description>