Update README.md

[Tanmay692004]

Clicking the logo image opens website in another tab

Description

The logo has been updated to be clickable and opens the PettingZoo website in a new tab when clicked. This change improves navigation by allowing users to visit the website without leaving the current page.

Type of change

• New feature on documentation (non-breaking change which adds functionality)

Screenshots

Before

After

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