Update environment creation tutorial with accurate obs/action space usage

[elliottower]

Description

Minor update addressing a question in discord about the usage of env.action_spaces (which is deprecated in favor of the env.action_space(agent) method).

Fixes # (issue), Depends on # (pull request)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Screenshots

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Checklist:

• I have run the pre-commit checks with pre-commit run --all-files (see CONTRIBUTING.md instructions to set it up)
• I have run pytest -v and no errors are present.
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I solved any possible warnings that pytest -v has generated that are related to my code to the best of my knowledge.
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[elliottower]

Want a second pair of eyes to confirm this looks good. Not much changes but for example render_mode I believe should be set in init but it wasn't listed as a required thing previously. I guess technically you can ignore it?

[jjshoots]

Will look at this a little later. Messaging here to subscribe.

[jjshoots]

I like the changes, makes more sense and is more up to date. But imho some things can be worded better, other than that, LGTM.