[RLlib](deps): Bump pettingzoo from 1.8.2 to 1.9.0 in /python/requirements/rllib

[dependabot]

Bumps pettingzoo from 1.8.2 to 1.9.0.

Release notes

Sourced from pettingzoo's releases.

1.9.0

-Created no action timer for pong to encourage players to serve (before there was no penalty to stalling the game forever). Bumped version of all pong environments (pong, basketball_pong, volleyball_pong, foozpong, quadrapong) -Fixed Multiwalker collision bug, bumped version -Add state method to Magent and MPE -Merged rock paper scissors and rock paper scissors lizard spock into a single environment that takes the number of actions as an argument, and adds the n_cycles argument to allow for a single game to be sequential. Bumped version -Removed depricated env_done method -Fixed order of channels in combined_arms observation -Added pixel art based RGB rendering to connect four. This will also be added to rock paper scissors, Go and Texas Holdem in upcoming releases -Moved pettingzoo CI test files outside of the repo -Changed max cycles test to be more robust under agent death

Commits

• 15110eb bumped pettingzoo version to 1.9.0
• 374877e Merge branch 'master' of github.com:PettingZoo-Team/PettingZoo
• 898556a bumped adversarial pursuit version
• b886b44 Update chess.md
• e6166f4 minor doc fix
• 98aeba3 Merge pull request #405 from PettingZoo-Team/go_doc_fix
• ea8b0a7 fixed go docs
• 672d06f Merge pull request #404 from PettingZoo-Team/combined_arms_bump
• 2ff1d6c Merge pull request #403 from PettingZoo-Team/tutorial_fix
• d01add8 bumped combined arms version and magent version
• Additional commits viewable in compare view

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[dependabot]

Superseded by #13.