[2pt] Fix luajit_getmetrics info about versions related staff availble in

[no1seman]

Info

Root document: where to fix the docs
https://www.tarantool.io/ru/doc/latest/book/app_server/luajit_getmetrics/
SME: @ igormunkin

What's wrong?

There is no info about versions of the Tarantool core (Taranool binary) where all the related staff is available.

Preliminary info (need to confirm with @ igormunkin):

• 1.10.x versions are not supported
• 2.x versions - starting only from 2.6.1