docs: update guide url and authors

[Xenira]

Refs: #500

Description

Updated the guide urls in preparation of org move. All other urls should redirect fine after the move. We can update them then.

Also added myself to the authors list while I was at it. @ptondereau let me know if and in which form you would also be added here. Did I miss someone else? We have been the more active members in recent time.

May only be merged after david updated the link in the repo settings.

Checklist

Check the boxes that apply (put an x in the brackets, like [x]). You can also check boxes after the PR is created.

• I have read the contribution guidelines.
• I have added tests that prove my code works as expected.
• I have added documentation if applicable.
• I have added a migration guide if applicable.

❤️ Thank you for your contribution!

[coveralls]

Pull Request Test Coverage Report for Build 16353870144

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 24.606%

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Totals
Change from base Build 16353567988:	0.0%
Covered Lines:	968
Relevant Lines:	3934

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💛 - Coveralls

[ptondereau]

Thanks for the heads up!
To be honest, I want to keep maintaining this project but my job and my private life are pretty full right now (and I want to thank you for keeping pushing this project up).
Anyway, I'm still up to help!

[Xenira]

@ptondereau really appreciate you making time to help out! No worries if you don't have time. Personal life always comes first.