Fix typo in textureHeight property (#31725)

examples/webgl_mirror.html

@@ -91,7 +91,7 @@
 				groundMirror = new Reflector( geometry, {
 					clipBias: 0.003,
 					textureWidth: size.width,
-					textureHeight: size.heignt,
+					textureHeight: size.height,
 					color: 0xb5b5b5
 				} );
 				groundMirror.position.y = 0.5;