Update many_segment_swimmer.py

gymnasium_robotics/envs/multiagent_mujoco/many_segment_swimmer.py

@@ -15,7 +15,7 @@
 
 
 def gen_asset(n_segs: int, asset_path: str) -> None:
-    """Generates a vartion of the Swimmer environment, but with many segments.
+    """Generates a variation of the Swimmer environment, but with many segments.
 
     This environment was first introduced ["FACMAC: Factored Multi-Agent Centralised Policy Gradients"](https://arxiv.org/abs/2003.06709).
     """