Docs: Fix redirect for geometry generators. (#22153)

Author: Mugen87

docs/index.html

@@ -82,7 +82,7 @@ <h1><a href="https://threejs.org">three.js</a></h1>
 
 			// *BufferGeometry to *Geometry
 
-			if ( /([\w]+)BufferGeometry$/.exec( window.location.hash ) ) {
+			if ( /^(?!.*(Instanced)).*BufferGeometry/.exec( window.location.hash ) ) {
 
 				window.location.hash = window.location.hash.replace( 'BufferGeometry', 'Geometry' );