RTLSDR: updated plugin version

plugins/samplesource/rtlsdr/rtlsdrplugin.cpp

@@ -14,7 +14,7 @@
 
 const PluginDescriptor RTLSDRPlugin::m_pluginDescriptor = {
 	QString("RTL-SDR Input"),
-	QString("3.11.0"),
+	QString("3.13.1"),
 	QString("(c) Edouard Griffiths, F4EXB"),
 	QString("https://github.com/f4exb/sdrangel"),
 	true,