fix name change

examples2d/all_examples2.rs

@@ -70,13 +70,13 @@ pub fn main() {
         ("Drum", drum2::init_world),
         ("Heightfield", heightfield2::init_world),
         ("Joints", joints2::init_world),
-        ("DistanceJoints", rope_joints2::init_world),
         ("Locked rotations", locked_rotations2::init_world),
         ("One-way platforms", one_way_platforms2::init_world),
         ("Platform", platform2::init_world),
         ("Polyline", polyline2::init_world),
         ("Pyramid", pyramid2::init_world),
         ("Restitution", restitution2::init_world),
+        ("Rope Joints", rope_joints2::init_world),
         ("Sensor", sensor2::init_world),
         ("Trimesh", trimesh2::init_world),
         ("(Debug) box ball", debug_box_ball2::init_world),