Support tinybench 6.0.0

[jbergstroem]

A major version was released yesterday and using it in CI failed to generate a report.

Example here: https://codspeed.io/jbergstroem/filtron/runs/692e15aa3ba5a2c5a386c253

[Q16solver]

This should probably be done in parallel with support vitest v5, which pins tinybench also to v6?