Update TubeGeometry docs

Fix wrong type for `closed`

docs/api/extras/geometries/TubeGeometry.html

@@ -51,7 +51,7 @@ var geometry = new THREE.TubeGeometry(
 		segments — [page:Integer] - The number of segments that make up the tube, default is 64<br />
 		radius — [page:Float] - The radius of the tube, default is 1<br />
 		radiusSegments — [page:Integer] - The number of segments that make up the cross-section, default is 8 <br />
-		closed — [page:Float] Is the tube open or closed, default is false <br />
+		closed — [page:Boolean] Is the tube open or closed, default is false <br />
 		</div>