[minor] Sort humanoid descriptions in the readme

Author: stephane-caron

README.md

@@ -210,6 +210,7 @@ The DOF column denotes the number of actuated degrees of freedom.
 | `atlas_v4_description`        | Atlas v4              | Boston Dynamics          | 30  | URDF       |
 | `draco3_description`          | Draco3                | Apptronik                | 25  | URDF       |
 | `ergocub_description`         | ergoCub               | IIT                      | 57  | URDF       |
+| `g1_description`              | G1                    | UNITREE Robotics         | 37  | URDF       |
 | `g1_mj_description`           | G1                    | UNITREE Robotics         | 37  | MJCF       |
 | `h1_description`              | H1                    | UNITREE Robotics         | 25  | URDF       |
 | `h1_mj_description`           | H1                    | UNITREE Robotics         | 25  | MJCF       |
@@ -223,7 +224,6 @@ The DOF column denotes the number of actuated degrees of freedom.
 | `sigmaban_description`        | SigmaBan              | Rhoban                   | 20  | URDF       |
 | `talos_description`           | TALOS                 | PAL Robotics             | 32  | URDF       |
 | `valkyrie_description`        | Valkyrie              | NASA JSC Robotics        | 59  | URDF       |
-| `g1_description`              | G1                    | UNITREE Robotics         | 37  | URDF       |
 
 ### Mobile manipulators