Hey, im trying to connect with ruest-mqtt to rumqttd server but im getting:

```
6.355360 INFO  DHCP is now up!
└─ switch_embassy_rs::____embassy_main_task::{async_fn#0} @ src/main.rs:122 
6.355571 DEBUG STARTING
└─ switch_embassy_rs::____embassy_main_task::{async_fn#0} @ src/main.rs:137 
6.356098 DEBUG CONNECT
└─ switch_embassy_rs::____embassy_main_task::{async_fn#0} @ src/main.rs:141 
6.358891 DEBUG address 192.168.1.1 not in neighbor cache, sending ARP request
└─ smoltcp::iface::interface::{impl#2}::lookup_hardware_addr @ /home/holo/.cargo/registry/src/index.crates.io-6f17d22bba15001f/smoltcp-0.11.0/src/macros.rs:18  
6.405479 DEBUG AFTER CONNECT
└─ switch_embassy_rs::____embassy_main_task::{async_fn#0} @ src/main.rs:143 
6.462560 ERROR panicked at src/main.rs:160:38:
called `Result::unwrap()` on an `Err` value: NetworkError
└─ panic_probe::print_defmt::print @ /home/holo/.cargo/registry/src/index.crates.io-6f17d22bba15001f/panic-probe-0.3.1/src/lib.rs:104 
```

On server side im getting such error:
```
 2024-02-02T21:34:49.244308Z ERROR rumqttd::server::broker: Error while handling MQTT connect packet, error: Network(Protocol(InvalidProtocolLevel(5)))
    in rumqttd::server::broker::remote_link with tenant_id: None
```
https://github.com/holotrack/switch-embassy-rs/blob/main/src/main.rs
Basically its copy/paste example from rut-mqtt except that im using embassy socket not tokio stream.