Replace remaining usages of yield with new await keyword

doc/classes/Control.xml

@@ -1044,7 +1044,7 @@
 		<member name="rect_scale" type="Vector2" setter="set_scale" getter="get_scale" default="Vector2(1, 1)">
 			The node's scale, relative to its [member rect_size]. Change this property to scale the node around its [member rect_pivot_offset]. The Control's [member hint_tooltip] will also scale according to this value.
 			[b]Note:[/b] This property is mainly intended to be used for animation purposes. Text inside the Control will look pixelated or blurry when the Control is scaled. To support multiple resolutions in your project, use an appropriate viewport stretch mode as described in the [url=https://docs.godotengine.org/en/latest/tutorials/viewports/multiple_resolutions.html]documentation[/url] instead of scaling Controls individually.
-			[b]Note:[/b] If the Control node is a child of a [Container] node, the scale will be reset to [code]Vector2(1, 1)[/code] when the scene is instantiated. To set the Control's scale when it's instantiated, wait for one frame using [code]yield(get_tree(), "process_frame")[/code] then set its [member rect_scale] property.
+			[b]Note:[/b] If the Control node is a child of a [Container] node, the scale will be reset to [code]Vector2(1, 1)[/code] when the scene is instantiated. To set the Control's scale when it's instantiated, wait for one frame using [code]await get_tree().process_frame[/code] then set its [member rect_scale] property.
 		</member>
 		<member name="rect_size" type="Vector2" setter="_set_size" getter="get_size" default="Vector2(0, 0)">
 			The size of the node's bounding rectangle, in pixels. [Container] nodes update this property automatically.

doc/classes/OS.xml

@@ -57,7 +57,7 @@
 			<argument index="0" name="msec" type="int" />
 			<description>
 				Delays execution of the current thread by [code]msec[/code] milliseconds. [code]msec[/code] must be greater than or equal to [code]0[/code]. Otherwise, [method delay_msec] will do nothing and will print an error message.
-				[b]Note:[/b] [method delay_msec] is a [i]blocking[/i] way to delay code execution. To delay code execution in a non-blocking way, see [method SceneTree.create_timer]. Yielding with [method SceneTree.create_timer] will delay the execution of code placed below the [code]yield[/code] without affecting the rest of the project (or editor, for [EditorPlugin]s and [EditorScript]s).
+				[b]Note:[/b] [method delay_msec] is a [i]blocking[/i] way to delay code execution. To delay code execution in a non-blocking way, see [method SceneTree.create_timer]. Awaiting with [method SceneTree.create_timer] will delay the execution of code placed below the [code]await[/code] without affecting the rest of the project (or editor, for [EditorPlugin]s and [EditorScript]s).
 				[b]Note:[/b] When [method delay_msec] is called on the main thread, it will freeze the project and will prevent it from redrawing and registering input until the delay has passed. When using [method delay_msec] as part of an [EditorPlugin] or [EditorScript], it will freeze the editor but won't freeze the project if it is currently running (since the project is an independent child process).
 			</description>
 		</method>
@@ -66,7 +66,7 @@
 			<argument index="0" name="usec" type="int" />
 			<description>
 				Delays execution of the current thread by [code]usec[/code] microseconds. [code]usec[/code] must be greater than or equal to [code]0[/code]. Otherwise, [method delay_usec] will do nothing and will print an error message.
-				[b]Note:[/b] [method delay_usec] is a [i]blocking[/i] way to delay code execution. To delay code execution in a non-blocking way, see [method SceneTree.create_timer]. Yielding with [method SceneTree.create_timer] will delay the execution of code placed below the [code]yield[/code] without affecting the rest of the project (or editor, for [EditorPlugin]s and [EditorScript]s).
+				[b]Note:[/b] [method delay_usec] is a [i]blocking[/i] way to delay code execution. To delay code execution in a non-blocking way, see [method SceneTree.create_timer]. Awaiting with [method SceneTree.create_timer] will delay the execution of code placed below the [code]await[/code] without affecting the rest of the project (or editor, for [EditorPlugin]s and [EditorScript]s).
 				[b]Note:[/b] When [method delay_usec] is called on the main thread, it will freeze the project and will prevent it from redrawing and registering input until the delay has passed. When using [method delay_usec] as part of an [EditorPlugin] or [EditorScript], it will freeze the editor but won't freeze the project if it is currently running (since the project is an independent child process).
 			</description>
 		</method>

doc/classes/SceneTree.xml

@@ -66,7 +66,7 @@
 				[gdscript]
 				func some_function():
 				    print("start")
-				    yield(get_tree().create_timer(1.0), "timeout")
+				    await get_tree().create_timer(1.0).timeout
 				    print("end")
 				[/gdscript]
 				[csharp]