fix[i18n]: typo in German translation

Author: vNovski

src/assets/i18n/de.json5

@@ -3450,7 +3450,7 @@
   "journalissue.listelement.badge": "Zeitschriftenheft",
 
   // "journalissue.page.description": "Description",
-  "journalissue.page.description": "Beschreibeung",
+  "journalissue.page.description": "Beschreibung",
 
   // "journalissue.page.edit": "Edit this item",
   "journalissue.page.edit": "Dieses Item bearbeiten",