Fix http4s build

[RafalSumislawski]

Fixing build failure as indicated by the logs: https://tfb-status.techempower.com/unzip/results.2026-02-03-23-09-26-607.zip/results/20260127014105/http4s/build/http4s.log

[joanhey]

Please add the maintainers in the benchmark_config.json.

So with any change or marked as broken, it'll be notified to them.

Example:

FrameworkBenchmarks/frameworks/Java/quarkus/benchmark_config.json

Lines 1 to 6 in 33531b8

	{
	"framework": "quarkus",
	"maintainers": ["franz1981", "Sanne", "geoand"],
	"tests": [
	{
	"default": {

[joanhey]

Please add the maintainers, or the next time that is marked as broken, nobody will be notified.