Replace "(school) class" with "group"

aleksis/apps/alsijil/frontend/messages/de.json

@@ -59,9 +59,9 @@
       },
       "filter": {
         "own": "Nur eigene Stunden anzeigen",
-        "groups": "Klassen",
+        "groups": "Gruppen",
         "courses": "Kurse",
-        "filter_for_obj": "Nach Klasse und Kurs filtern"
+        "filter_for_obj": "Nach Gruppe und Kurs filtern"
       },
       "no_data": "Keine Stunden der ausgewählten Gruppen und Kurse im aktuellen Zeitraum",
       "no_results": "Keine Suchergebnisse für {search}"

aleksis/apps/alsijil/frontend/messages/en.json

@@ -59,9 +59,9 @@
       },
       "filter": {
         "own": "Only show own lessons",
-        "groups": "School classes",
+        "groups": "Groups",
         "courses": "Courses",
-        "filter_for_obj": "Filter for school class and course"
+        "filter_for_obj": "Filter for group and course"
       },
       "no_data": "No lessons for the selected groups and courses in this period",
       "no_results": "No search results for {search}"