* rethrow MqttClientUnexpectedDisconnectReceivedException when Publish errors out because server disconnects the client and QoS is 0
* use a local var to cache _unexpectedDisconnectPacket
* Add inner exception to new exception
* Update release notes
* set the default inner exception as null
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Co-authored-by: christian <6939810+chkr1011@users.noreply.github.com>
