Update h2 and zerocopy crates to fix vulnerabilities

[striezel]

The following updates are performed:

• update h2 to 0.3.24 to fix RUSTSEC-2024-0003 (a resource exhaustion vulnerability that may lead to denial of service), see https://rustsec.org/advisories/RUSTSEC-2024-0003 for more information
• update zerocopy to 0.7.32 to fix RUSTSEC-2023-0074 (some Ref methods are unsound), for more information see https://rustsec.org/advisories/RUSTSEC-2023-0074