brightness in plugin

plugin/repo.xml

@@ -1,7 +1,7 @@
 <?xml version='1.0' standalone='yes'?>
 <extensions>
   <plugins>
-    <plugin version="0.5" name="SqueezeESP32" minTarget="7.9" maxTarget="7.*">
+    <plugin version="0.6" name="SqueezeESP32" minTarget="7.9" maxTarget="7.*">
       <link>https://github.com/sle118/squeezelite-esp32</link>
       <creator>Philippe</creator>
       <sha>e43f87096bafbbf4d97637a690975266af8e03c4</sha>