i18n: fix typo in German translation (localsend#1331)

Author: jakob30061

app/assets/i18n/strings_de.i18n.json

@@ -108,7 +108,7 @@
       "autoFinish": "Autom. beenden",
       "destination": "Ziel-Ordner",
       "downloads": "(Downloads)",
-      "saveToGallery": "Medien in die Gallerie speichern",
+      "saveToGallery": "Medien in die Galerie speichern",
       "saveToHistory": "In Verlauf speichern"
     },
     "send": {