Add `agent.pt` and tag the environment

This commit adds a model that is compatible with the 🥇 [Open RL Leaderboard](https://huggingface.co/spaces/open-rl-leaderboard/leaderboard) 🥇.

README.md

@@ -5,6 +5,7 @@ tags:
 - deep-reinforcement-learning
 - reinforcement-learning
 - stable-baselines3
+- Humanoid-v4
 model-index:
 - name: TRPO
   results:

agent.pt

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:8ddc8a5d47aebd3591dc8e21a3e5d5f80885b5b0eea2fdc2e3ebcdf20b3f30dd
-size 122406
+oid sha256:4f1bfde04953d7c1f5c538d64528ab51d1d8123ea7eb83df32fc2683210a4aa2
+size 129418