Please remove rustls 0.20.9 from dependencies

[nazar-pc]

It triggers security advisory that I have to suppress in our Substrate-based project because of litep2p: https://rustsec.org/advisories/RUSTSEC-2024-0336.html

[dmitry-markin]

This should be mitigated by not enabling QUIC transport once we release the version with optional transports. Meanwhile I will look what can be done, upgrading quinn should be enough.