Update to gymnasium1.0

[JulienT01]

Update rlberry to gymnasium 1.0 (and other dependencies)

Checklist

• My code follows the style guideline
  To check :
  black --check examples rlberry *py
  flake8 --select F401,F405,D410,D411,D412 --exclude=rlberry/check_packages.py --per-file-ignores="init.py:F401",
• I have commented my code, particularly in hard-to-understand areas,
• I have made corresponding changes to the documentation,
• 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,
• If updated the changelog if necessary,
• I have set the label "ready for review" and the checks are all green.