Fix: correct unpacking order in play_one_step (truncated/info swapped)

[ShindeShivam]

Chapter :18

Cell : Fixed Q-Value Targets , Double DQN , Dueling Double DQN

Play_one_step() returns (next_state, reward, done, truncated, info), but the training loops unpacked it as (obs, reward, done, info, truncated).

Fixed by using the correct order:

obs, reward, done, truncated, info = play_one_step(env, obs, epsilon)

[ageron]

Great catch @ShindeShivam, thanks a lot for the PR. 👍