fix: Read the correct lyrics

app/src/main/java/com/cappielloantonio/play/subsonic/models/Lyrics.kt

@@ -1,7 +1,7 @@
 package com.cappielloantonio.play.subsonic.models
 
 class Lyrics {
-    var content: String? = null
+    var value: String? = null
     var artist: String? = null
     var title: String? = null
 }