[MLA-1952] Add optional seed for gym action spaces (#5303) (#5315)

com.unity.ml-agents/CHANGELOG.md

 ### Minor Changes
 #### com.unity.ml-agents / com.unity.ml-agents.extensions (C#)
 #### ml-agents / ml-agents-envs / gym-unity (Python)
-The `UnityToGymWrapper` initializer now accepts an optional `action_space_seed` seed. If this is specified, it will
-be used to set the random seed on the resulting action space. (#5303)
 ### Bug Fixes
 
 
 #### ml-agents / ml-agents-envs / gym-unity (Python)
 - Fixed a bug where --results-dir has no effect. (#5269)
 - Fixed a bug where old `.pt` checkpoints were not deleted during training. (#5271)
+- The `UnityToGymWrapper` initializer now accepts an optional `action_space_seed` seed. If this is specified, it will
+be used to set the random seed on the resulting action space. (#5303)
+
 
 ## [1.9.1-preview] - 2021-04-13
 ### Major Changes