fix typo VertexNodeNode -> VertexNode (#30239)

docs/examples/en/math/convexhull/ConvexHull.html

@@ -86,7 +86,7 @@
 
 		<h3>[method:this addVertexToFace]( [param:VertexNode vertex], [param:Face face]	)</h3>
 		<p>
-			[page:VertexNodeNode vertex] - The vertex to add.<br />
+			[page:VertexNode vertex] - The vertex to add.<br />
 			[page:Face face] - The target face.<br /><br />
 
 			Adds a vertex to the 'assigned' list of vertices and assigns it to the given face.

docs/examples/zh/math/convexhull/ConvexHull.html

@@ -88,7 +88,7 @@
 
 	<h3>[method:this addVertexToFace]( [param:VertexNode vertex], [param:Face face] )</h3>
 	<p>
-		[page:VertexNodeNode vertex] - 要添加的顶点。<br />
+		[page:VertexNode vertex] - 要添加的顶点。<br />
 		[page:Face face] - 目标面。<br /><br />
 
 		将一个顶点添加到 “分配(assigned)” 顶点列表，并将其分配给给定的面。