Update read me with llama3 numbers

Summary:
Measurement is in progress and some runs have failed for one plus 12 (device not found).

//pre-existing lint error
bypass-github-export-checks

Created from CodeHub with https://fburl.com/edit-in-codehub

Reviewed By: mergennachin

Differential Revision: D59171230

fbshipit-source-id: 2e48101f881cc15368fe9e0cd4ed986788a13434