chore(deps): update dependency django to v4.2.9 (#1326)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [Django](https://www.djangoproject.com/) ([source](https://togithub.com/django/django), [changelog](https://togithub.com/django/django/tree/master/docs/releases)) | `==4.2.7` -> `==4.2.9` | [![age](https://developer.mend.io/api/mc/badges/age/pypi/Django/4.2.9?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/Django/4.2.9?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/Django/4.2.7/4.2.9?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/Django/4.2.7/4.2.9?slim=true)](https://docs.renovatebot.com/merge-confidence/) |
| [django](https://www.djangoproject.com/) ([source](https://togithub.com/django/django), [changelog](https://togithub.com/django/django/tree/master/docs/releases)) | `==4.2.7` -> `==4.2.9` | [![age](https://developer.mend.io/api/mc/badges/age/pypi/django/4.2.9?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/django/4.2.9?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/django/4.2.7/4.2.9?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/django/4.2.7/4.2.9?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

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

### [`v4.2.9`](https://togithub.com/django/django/compare/4.2.8...4.2.9)

[Compare Source](https://togithub.com/django/django/compare/4.2.8...4.2.9)

### [`v4.2.8`](https://togithub.com/django/django/compare/4.2.7...4.2.8)

[Compare Source](https://togithub.com/django/django/compare/4.2.7...4.2.8)

</details>

---

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Author: renovate-bot

python/cloud-run-django-hello-world/requirements.txt

@@ -1,3 +1,3 @@
-django==4.2.7
+django==4.2.9
 requests==2.31.0
 debugpy # Required for debugging.

python/django/python-guestbook/src/requirements.txt

@@ -1,3 +1,3 @@
-Django==4.2.7
+Django==4.2.9
 psycopg2-binary==2.9.9
 python-dateutil==2.8.2

python/django/python-hello-world/src/requirements.txt

@@ -1,4 +1,4 @@
-Django==4.2.7
+Django==4.2.9
 requests==2.31.0
 psycopg2-binary==2.9.9
 debugpy # Required for debugging