Add python3-paho-mqtt to the required rpm packages

Author: darrylb123

README.md

@@ -96,7 +96,7 @@ $ sudo apt-get install usbrelay
 The packages are available in Fedora36+
 
 ```
-$ sudo dnf install usbrelay-common usbrelay-python3 usbrelay-mqtt
+$ sudo dnf install usbrelay-common python3-usbrelay usbrelay-mqtt
 ```
 
 Other Linux platforms will need to build the source, see below

rpm/usbrelay.spec

@@ -55,6 +55,7 @@ Summary: Python 3 user interface for usbrelay
 %package mqtt
 Requires: %{name}-common%{_isa} = %{version}-%{release}
 Requires: python3-%{name}%{_isa} = %{version}-%{release}
+Requires: python3-paho-mqtt
 Summary: Support for Home Assistant or nodered with usbrelay
 %description mqtt
 %{common_description}