fix(gfootball): only increment elapsed_step when episode is not done

The elapsed_step counter was always incremented even when the episode
was already done (truncated/terminated). This caused the elapsed_step
value in the info dict to be one higher than expected on the final
step. Only increment when the episode continues.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: Test User

envpool/gfootball/gfootball_oracle_util.py

@@ -298,8 +298,8 @@ def step(
             self._engine.waiting_for_game_count = 0
         if self._step >= self._max_episode_steps:
             done = True
-
-        self._elapsed_step += 1
+        else:
+            self._elapsed_step += 1
 
         truncated = np.bool_(done and self._step >= self._max_episode_steps)
         terminated = np.bool_(done and not truncated)