Translations: add missing comma

custom_components/tuya_local/translations/de.json

@@ -324,7 +324,7 @@
                     "9h30m": "9 Stunden 30 Minuten",
                     "10h": "10 Stunden",
                     "11h": "11 Stunden",
-                    "12h": "12 Stunden"
+                    "12h": "12 Stunden",
                     "13h": "13 Stunden",
                     "14h": "14 Stunden",
                     "15h": "15 Stunden",