Update Cairo Documentation link to resolve 404 error

[Giri-Aayush]

The current README contains an outdated link for Cairo Documentation:

• Cairo Documentation - Official Cairo 1.0 Documentation.

This link leads to a 404 error page (see attached screenshot).

Proposed change: Update the link to the current official Cairo Documentation:

• Cairo Documentation - Official Cairo 1.0 Documentation.

Screenshot showing the 404 error:

This update will ensure users are directed to the correct, up-to-date Cairo documentation, improving the overall usefulness of our resource list.