Ensure the model gets saved / exported to onnx using CTRL + C - sb3 imitation#241

Ivan-267 wants to merge 2 commits intomainedbeeching/godot_rl_agents:mainfrom

fix-early-termination-sb3-imitationedbeeching/godot_rl_agents:fix-early-termination-sb3-imitationCopy head branch name to clipboard