ApiRoute => Fix missing route (deleted by error)

types/Dojo/ApiRoute.ts

@@ -9,6 +9,7 @@ enum ApiRoute {
     ASSIGNMENT_UNPUBLISH                = '/assignments/{{assignmentNameOrUrl}}/unpublish',
     ASSIGNMENT_CORRECTION_LINK          = '/assignments/{{assignmentNameOrUrl}}/corrections',
     ASSIGNMENT_CORRECTION_UPDATE_DELETE = '/assignments/{{assignmentNameOrUrl}}/corrections/{{exerciseIdOrUrl}}',
+    EXERCISE_ASSIGNMENT                 = '/exercises/{{exerciseIdOrUrl}}/assignment',
     EXERCISE_CREATE                     = '/assignments/{{assignmentNameOrUrl}}/exercises',
     EXERCISE_RESULTS                    = '/exercises/{{exerciseIdOrUrl}}/results',
     EXERCISE_LIST                       = '/exercises',