draft: Add, remove & update Rust Girona events

[ifraixedes]

• Delete past on-site event.
• Add next on-site event.
• Update links to the webpage of the Rust Girona community because the previous domain was not renewed.

[nellshamrell]

Hello there! Thanks for submitting this to This Week in Rust! We have lots of regular contributors, so I'm this notice to each pull request we receive this week.

NO ACTION IS NEEDED ON THIS pull request - this is only a heads up for next week and beyond.

On November 13, This Week in Rust will be following the example of the Rust Project and renaming its default branch from "master" to "main". Starting next week, pull requests will need to be to the "main" branch, rather than the "master" branch. For guidance on how to rename your fork's default branch and update your local checkout, please see this Rust Project blog post for guidance.

Thank you again so much for contributing to This Week in Rust!