fix(frontend): Missende commas

frontend/src/i18n/locale/de.json

@@ -103,7 +103,7 @@
     "description": "Beschreibung",
     "no-submission": "keine vorlage",
     "submission": "Einreichung",
-    "progress": "Fortschritte"
+    "progress": "Fortschritte",
     "created": "erstellt",
     "remove": "entfernen",
     "students": "Studenten",

frontend/src/i18n/locale/en.json

@@ -103,7 +103,7 @@
     "description": "Description",
     "no-submission": "no submission",
     "submission": "Submission",
-    "progress": "Progress"
+    "progress": "Progress",
     "created": "created",
     "remove": "remove",
     "students": "students",

frontend/src/i18n/locale/fr.json

@@ -104,7 +104,7 @@
     "description": "Description",
     "no-submission": "aucune soumission",
     "submission": "Soumission",
-    "progress": "Progrès"
+    "progress": "Progrès",
     "remove": "supprimer",
     "students": "étudiants",
     "classJoinRequests": "demandes d'adhésion",

frontend/src/i18n/locale/nl.json

@@ -104,7 +104,7 @@
     "description": "Beschrijving",
     "no-submission": "geen indiening",
     "submission": "Indiening",
-    "progress": "Vooruitgang"
+    "progress": "Vooruitgang",
     "remove": "verwijder",
     "students": "studenten",
     "classJoinRequests": "deelname verzoeken",