varnish:6 security update

Varnish Cache is a high-performance HTTP accelerator. It stores web pages in
memory so web servers don't have to create the same web page over and over
again, giving the website a significant speed up.

Security Fix(es):

varnish: HTTP/2 Broken Window Attack may result in denial of service
(CVE-2024-30156)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE page(s)
listed in the References section.

CVE(s):
CVE-2024-30156
Varnish Cache before 7.3.2 and 7.4.x before 7.4.3 (and before 6.0.13 LTS), and Varnish Enterprise 6 before 6.0.12r6, allows credits exhaustion for an HTTP/2 connection control flow window, aka a Broke Window Attack.

Modularity name: "varnish"
Stream name: "6"