benchmarks/hipercontracer: Update 2.2.6 => 2.2.8

Changelog:
https://github.com/dreibh/hipercontracer/blob/hipercontracer-2.2.8/ChangeLog

Commit log:
https://github.com/dreibh/hipercontracer/compare/hipercontracer-2.2.6...hipercontracer-2.2.8

PR: 297270
Reported by: Thomas Dreibholz <thomas.dreibholz@gmail.com> (maintainer)
Approved by: osa, vvd (Mentors, implicit)