* deps: bump rustls to 0.21.11
This is done to fix CVE-2024-32650, which practically shouldn't affect
us but it's still better not to use vulnerable dependencies.
* deps: bump h2 to 0.3.26
This is done to fix another vulnerability, which should also not affect
us (non-critical, in h2 servers)
* fix: move Shared<T> to types/mod.rs