Update dependency django to v5.1.8 [SECURITY] (#2161)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [django](https://redirect.github.com/django/django)
([changelog](https://docs.djangoproject.com/en/stable/releases/)) |
patch | `==5.1.7` -> `==5.1.8` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

### GitHub Vulnerability Alerts

#### [CVE-2025-27556](https://nvd.nist.gov/vuln/detail/CVE-2025-27556)

An issue was discovered in Django 5.1 before 5.1.8 and 5.0 before
5.0.14. The NFKC normalization is slow on Windows. As a consequence,
django.contrib.auth.views.LoginView,
django.contrib.auth.views.LogoutView, and django.views.i18n.set_language
are subject to a potential denial-of-service attack via certain inputs
with a very large number of Unicode characters.

---

### Release Notes

<details>
<summary>django/django (django)</summary>

###
[`v5.1.8`](https://redirect.github.com/django/django/compare/5.1.7...5.1.8)

[Compare
Source](https://redirect.github.com/django/django/compare/5.1.7...5.1.8)

</details>

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aws-py-django-voting-app/frontend/requirements.txt

@@ -1,2 +1,2 @@
-django==5.1.7
+django==5.1.8
 mysqlclient==2.2.7