[BugFix] Fix MARL PPO tutorial action_spec call

ghstack-source-id: 1d9058c
Pull Request resolved: #2628

Author: Vincent Moens

tutorials/sphinx-tutorials/multiagent_ppo.py

@@ -450,8 +450,8 @@
     out_keys=[env.action_key],
     distribution_class=TanhNormal,
     distribution_kwargs={
-        "low": env.action_spec_unbatched[env.action_key].space.low,
-        "high": env.action_spec_unbatched[env.action_key].space.high,
+        "low": env.full_action_spec_unbatched[env.action_key].space.low,
+        "high": env.full_action_spec_unbatched[env.action_key].space.high,
     },
     return_log_prob=True,
     log_prob_key=("agents", "sample_log_prob"),