[CRIU] readme: Asciinema Demo

[Radostin Stoyanov]

Hello,

I just noticed that the Asciinema demo in README.md was archived.

>From the information in: https://blog.asciinema.org/

Archived recordings won’t be deleted, they’ll be hidden from listings
and inaccessible via direct link. Actual removal from database and file
store will happen some time after archival, but probably not sooner than
few weeks/months after archival.

Should we create a new recording or try to claim the old one?

Radostin