[clang] [C2y] Update the C Status Page from the recent meetings (PR #186487)

[Vlad Serebrennikov via cfe-commits]

https://github.com/Endilll commented:

I see four more core language papers adopted in february minutes:
— https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3751.txt
— https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3788.htm
— https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3647.pdf
— https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3648.pdf

I don't necessarily argue that we need to list them, but would be nice to know how you draw the line between what to list on the status page and what to omit.

https://github.com/llvm/llvm-project/pull/186487