Fix missing URL text in the classref

(cherry picked from commit a90c348a86d60cdabac9e7f5d1109beeaa52b506)

doc/classes/AnimationNodeStateMachineTransition.xml

@@ -11,7 +11,7 @@
 	</methods>
 	<members>
 		<member name="advance_condition" type="String" setter="set_advance_condition" getter="get_advance_condition" default="&quot;&quot;">
-			Turn on auto advance when this condition is set. The provided name will become a boolean parameter on the [AnimationTree] that can be controlled from code (see [url=$DOCS_URL/tutorials/animation/animation_tree.html#controlling-from-code][/url]). For example, if [member AnimationTree.tree_root] is an [AnimationNodeStateMachine] and [member advance_condition] is set to [code]"idle"[/code]:
+			Turn on auto advance when this condition is set. The provided name will become a boolean parameter on the [AnimationTree] that can be controlled from code (see [url=$DOCS_URL/tutorials/animation/animation_tree.html#controlling-from-code]Using AnimationTree[/url]). For example, if [member AnimationTree.tree_root] is an [AnimationNodeStateMachine] and [member advance_condition] is set to [code]"idle"[/code]:
 			[codeblock]
 			$animation_tree["parameters/conditions/idle"] = is_on_floor and (linear_velocity.x == 0)
 			[/codeblock]