Fixes the following security vulnerability:
- CVE-2025-57804: HTTP/2 request splitting via CRLF injection
https://github.com/python-hyper/h2/security/advisories/GHSA-847f-9342-265h
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 2389965eaf)
Signed-off-by: Titouan Christophe <titouan.christophe@mind.be>