[css-contain-2] Removed "Twitter" from CSS Contain 2

[OddDev]

Twitter was rebranded to "X". With the latest development I think that a more persistent platform like Mastodon is a better example for this document. Thus changed all occurrences of Twitter to Mastodon.

[OddDev]

User affiliation information is not needed, as this is editorial.

[w3cbot]

svgeesus marked as non substantive for IPR from ash-nazg.

[tabatkins]

I think it's fine as-is; Twitter is still correct historically (and will likely be in the future, imo). I don't think we need to follow the deranged descent-into-madness of the company's current owner.

[OddDev]

Thanks for taking the time to review this @tabatkins ! 😊 Very honored to interact with you.

Can you elaborate on this a little? I might miss some insights in guidelines etc. The work is already done and appears - in my eyes - to be an improvement regardless, no? 😬

I don't think we need to follow the deranged descent-into-madness of the company's current owner.

That's what I was trying to do with this PR actually. I didn't want an "implicit ad" for a platform that is currently in an "interesting" state. 😅
From my naive standpoint it appears to be the other way around.

Thanks again for taking the time! You rock. 🚀🙌