This update for cpp-httplib fixes the following issues:

- CVE-2025-53629: Fixed that a header can allocate memory arbitrarily in the server, potentially leading to its exhaustion (boo#1246471)
- CVE-2025-53628: Fixed HTTP header smuggling due to insecure trailers merge (boo#1246468)
- CVE-2025-52887: Fixed that the number of HTTP header fields was not limited, which can lead to potential exhaustion of system memory (boo#1245414)