update README

Author: lilkm

ufactory_xarm7/README.md

@@ -4,12 +4,10 @@ Requires MuJoCo 2.3.3 or later.
 
 ## Changelog
 
-- **17/12/2024**: Improved object grasping by:
+- **17/12/2024**: Improved object grasping (thanks to [@s1lent4gnt](https://github.com/s1lent4gnt)) by:
   - Adding two collision box meshes as pads for each finger.
   - Setting `armature=0.1` for the joints.
 
-  These changes resolve [issue #83](https://github.com/google-deepmind/mujoco_menagerie/issues/83) and are implemented in [PR #131](https://github.com/google-deepmind/mujoco_menagerie/pull/131).
-
 ## Overview
 
 This package contains a simplified robot description (MJCF) of the [xArm7