Docs:Update TransformControls.html (mrdoob#30683)

Fill in the missing content for Chinese documents
Add [setScaleSnap] method description

Author: kang-git

docs/examples/zh/controls/TransformControls.html

@@ -223,6 +223,16 @@ <h3>[method:undefined setTranslationSnap] ( [param:Number translationSnap] )</h3
 			</p>
 		</p>
 
+		<h3>[method:undefined setScaleSnap] ( [param:Number scaleSnap] )</h3>
+		<p>
+			<p>
+				[page:Number scaleSnap]: 缩放捕捉步幅。
+			</p>
+			<p>
+				设置缩放捕捉。
+			</p>
+		</p>
+
 		<h2>源代码</h2>
 
 		<p>