www/h2o-devel: use 20220208 snapshot with upstreamed patch

A local patch was used to address the vuln immediately on release, and
together with upstream committers this improved patch was merged.

No vuxml changes are required.

MFH: 2022Q1
Security: CVE-2021-43848
Sponsored by: SkunkWerks, GmbH

(cherry picked from commit 9b2894a247cc0eb8f292eedff41e39fdf7ca8e8f)