Upgraded MQTTnet and protobuf-ne#120

Open

heppth wants to merge 1 commit intoSeppPenner:masterfrom

Commits on Aug 5, 2025

Upgraded `MQTTnet` from version `4.3.7.1207` to `5.0.1.1416` and `protobuf-net` from version `3.2.45` to `3.2.56
heppth
committed