"gh clone student-repos" not showing certain assignments

Describe the bug

When I use `gh classroom clone student-repos` not all the assignments in my classroom are visible

Steps to reproduce the behavior

1. Created a new assignment.
2. Used dummy student account to accept assignment.
3. Made a change and then synchronised the "student repo".
4. The changes appear on the student repo page.
5. When running `gh classroom clone student-repos` I select the classroom and then want to select the appropriate assignment to clone but can't

Expected vs actual behavior

Other assignments are visible but 2 are not. I would expect all the assignments should be visible when I run `gh classroom clone student-repos`. If I run `gh classroom assignments` I can see that the project and class_test_2023 are visible and there is at least one student who has synced properly.

The only difference, if it is significant, between these assignments is that when first created project and class_test_2023 had a deadline. I tried editing this deadline to remove it but still can't see in list of assignments on cli. What am I missing?

Inizia riproducendo il problema con `gh classroom clone student-repos` dopo aver creato, accettato e sincronizzato assegnazioni con e senza scadenze. Confronta le assegnazioni restituite da `gh classroom assignments` con quelle offerte dal comando di clonazione. Il lavoro è completato quando ogni assegnazione idonea con un repository dello studente sincronizzato appare per la selezione.

Scritto dal modello di indicizzazione a partire dal testo della issue.