UserManagement::deletePersonalData: use the new name for the table with...

UserManagement::deletePersonalData: use the new name for the table with schedule entries, fixes #4870

Closes #4870

Merge request studip/studip!3654

lib/classes/UserManagement.php

@@ -1196,7 +1196,7 @@ class UserManagement
             "DELETE FROM user_online WHERE user_id = ?",
             "DELETE FROM auto_insert_user WHERE user_id = ?",
             "DELETE FROM roles_user WHERE userid = ?",
-            "DELETE FROM schedule WHERE user_id = ?",
+            "DELETE FROM schedule_entries WHERE user_id = ?",
             "DELETE FROM schedule_courses WHERE user_id = ?",
             "DELETE FROM termin_related_persons WHERE user_id = ?",
             "DELETE FROM priorities WHERE user_id = ?",