Update Batoto toString() method to support downloaded chapters

app/src/main/java/eu/kanade/tachiyomi/source/online/english/Batoto.kt

@@ -24,4 +24,8 @@ class Batoto : Source {
         return Observable.error(Exception("RIP Batoto"))
     }
 
+    override fun toString(): String {
+        return "$name (EN)"
+    }
+
 }