Change all single quotes to double quotes in README.md for consistency.

PiperOrigin-RevId: 696601373
Change-Id: I5cba7c443a6a90320847859c1625fc70cc6d9979

README.md

@@ -24,15 +24,15 @@ powerful simulator like MuJoCo with many modeling options, it is easy to create
 provide the community with a curated library of well-designed models that work
 well right out of the gate.
 
-|<img src='assets/franka_fr3-fr3.png' width=100>|<img src='assets/kinova_gen3-gen3.png' width=100>|<img src='assets/kuka_iiwa_14-iiwa14.png' width=100>|<img src='assets/ufactory_lite6-lite6.png' width=100>|<img src='assets/franka_emika_panda-panda.png' width=100>|
+|<img src="assets/franka_fr3-fr3.png" width=100>|<img src="assets/kinova_gen3-gen3.png" width=100>|<img src="assets/kuka_iiwa_14-iiwa14.png" width=100>|<img src="assets/ufactory_lite6-lite6.png" width=100>|<img src="assets/franka_emika_panda-panda.png" width=100>|
 | :---: | :---: | :---: | :---: | :---: |
-|<img src='assets/rethink_robotics_sawyer-sawyer.png' width=100>|<img src='assets/universal_robots_ur10e-ur10e.png' width=100>|<img src='assets/universal_robots_ur5e-ur5e.png' width=100>|<img src='assets/trossen_vx300s-vx300s.png' width=100>|<img src='assets/ufactory_xarm7-xarm7.png' width=100>|
-|<img src='assets/unitree_z1-z1.png' width=100>|<img src='assets/aloha-aloha.png' width=100>|<img src='assets/robotiq_2f85-2f85.png' width=100>|<img src='assets/franka_emika_panda-hand.png' width=100>|<img src='assets/ufactory_xarm7-hand.png' width=100>|
-|<img src='assets/wonik_allegro-left_hand.png' width=100>|<img src='assets/shadow_hand-left_hand.png' width=100>|<img src='assets/leap_hand-left_hand.png' width=100>|<img src='assets/shadow_dexee-shadow_dexee.png' width=100>|<img src='assets/google_robot-robot.png' width=100>|
-|<img src='assets/hello_robot_stretch-stretch.png' width=100>|<img src='assets/unitree_a1-a1.png' width=100>|<img src='assets/anybotics_anymal_b-anymal_b.png' width=100>|<img src='assets/anybotics_anymal_c-anymal_c.png' width=100>|<img src='assets/google_barkour_v0-barkour_v0.png' width=100>|
-|<img src='assets/google_barkour_vb-barkour_vb.png' width=100>|<img src='assets/unitree_go1-go1.png' width=100>|<img src='assets/unitree_go2-go2.png' width=100>|<img src='assets/boston_dynamics_spot-spot_arm.png' width=100>|<img src='assets/agility_cassie-cassie.png' width=100>|
-|<img src='assets/unitree_g1-g1.png' width=100>|<img src='assets/unitree_h1-h1.png' width=100>|<img src='assets/robotis_op3-op3.png' width=100>|<img src='assets/pal_talos-talos.png' width=100>|<img src='assets/bitcraze_crazyflie_2-cf2.png' width=100>|
-|<img src='assets/skydio_x2-x2.png' width=100>|<img src='assets/flybody-fruitfly.png' width=100>|<img src='assets/realsense_d435i-d435i.png' width=100>|||
+|<img src="assets/rethink_robotics_sawyer-sawyer.png" width=100>|<img src="assets/universal_robots_ur10e-ur10e.png" width=100>|<img src="assets/universal_robots_ur5e-ur5e.png" width=100>|<img src="assets/trossen_vx300s-vx300s.png" width=100>|<img src="assets/ufactory_xarm7-xarm7.png" width=100>|
+|<img src="assets/unitree_z1-z1.png" width=100>|<img src="assets/aloha-aloha.png" width=100>|<img src="assets/robotiq_2f85-2f85.png" width=100>|<img src="assets/franka_emika_panda-hand.png" width=100>|<img src="assets/ufactory_xarm7-hand.png" width=100>|
+|<img src="assets/wonik_allegro-left_hand.png" width=100>|<img src="assets/shadow_hand-left_hand.png" width=100>|<img src="assets/leap_hand-left_hand.png" width=100>|<img src="assets/shadow_dexee-shadow_dexee.png" width=100>|<img src="assets/google_robot-robot.png" width=100>|
+|<img src="assets/hello_robot_stretch-stretch.png" width=100>|<img src="assets/unitree_a1-a1.png" width=100>|<img src="assets/anybotics_anymal_b-anymal_b.png" width=100>|<img src="assets/anybotics_anymal_c-anymal_c.png" width=100>|<img src="assets/google_barkour_v0-barkour_v0.png" width=100>|
+|<img src="assets/google_barkour_vb-barkour_vb.png" width=100>|<img src="assets/unitree_go1-go1.png" width=100>|<img src="assets/unitree_go2-go2.png" width=100>|<img src="assets/boston_dynamics_spot-spot_arm.png" width=100>|<img src="assets/agility_cassie-cassie.png" width=100>|
+|<img src="assets/unitree_g1-g1.png" width=100>|<img src="assets/unitree_h1-h1.png" width=100>|<img src="assets/robotis_op3-op3.png" width=100>|<img src="assets/pal_talos-talos.png" width=100>|<img src="assets/bitcraze_crazyflie_2-cf2.png" width=100>|
+|<img src="assets/skydio_x2-x2.png" width=100>|<img src="assets/flybody-fruitfly.png" width=100>|<img src="assets/realsense_d435i-d435i.png" width=100>|||
 
 - [Getting Started](#getting-started)
   - [Prerequisites](#prerequisites)