Update German translation

locales/de.json

@@ -6,7 +6,7 @@
     "Unsubscribe": "Abbestellen",
     "Subscribe": "Abonnieren",
     "View channel on YouTube": "Kanal auf YouTube anzeigen",
-    "View playlist on YouTube": "",
+    "View playlist on YouTube": "Wiedergabeliste auf YouTube anzeigen",
     "newest": "neueste",
     "oldest": "älteste",
     "popular": "beliebt",
@@ -315,4 +315,4 @@
     "Videos": "Videos",
     "Playlists": "Wiedergabelisten",
     "Current version: ": "Aktuelle Version: "
-}
+}