Fix for the collision problem in the pusher environment

[YaroslavPonomarenko]

Description

The issue involves inaccurate collision calculations in a robotic manipulation experiment due to an error in the file pusher.xml. This error prevents the robot gripper from successfully grasping the cup. To rectify this issue, line 69 within the pusher.xml file needs modification.

Fixes # (issue)
Change:
<geom rgba="1 1 1 0" type="sphere" size=“0.05 0.05 0.05" density="0.00001" conaffinity="0"/>
To:

Type of change

• [x ] Bug fix (non-breaking change which fixes an issue)

Video

Before: https://github.com/openai/gym/assets/83762186/6f6f6e4e-e524-459a-8022-7574eea85abf
After: https://github.com/openai/gym/assets/83762186/2be15619-3787-4b34-b6ef-9df9876ff8ce

[pseudo-rnd-thoughts]

We are no longer updating Gym with all changes happening on Gymnasium. Please see changes on Farama-Foundation/Gymnasium#950

[w1463442883]

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