rumqttc: Panic when using rustls if there is an unsupported certificate in the native cert store

[WolfspiritM]

Hello,

Currently on my Windows machine rumqttc with default TlsConfiguration and rustls panics here:
https://github.com/bytebeamio/rumqtt/blob/005f73caf0c2a808210fd73f2db6e1bc38652c5c/rumqttc/src/lib.rs#L358C13-L358C48

with:
called Result::unwrap() on an Err value: InvalidCertificate(Other(OtherError(UnsupportedCriticalExtension)))

The certificate in question is a self signed local certificate for the Razer Chroma API.

I think instead of unwrap it's fine to just continue and ignoring that unsupported certificate.