Update rustls to 0.23.45 for RUSTSEC-2026-0285

Update rustls to 0.23.45 for RUSTSEC-2026-0285 A TLS 1.3 handshake vulnerability in rustls (transitive via tokio-rustls -> reqwest, hyper-rustls and aws-smithy-http-client). A fresh advisory, so cargo-deny's advisories gate began failing on an unchanged dependency set. Patch-level bump 0.23.43 -> 0.23.45; advisories/bans/licenses/sources all green again.