Update Django from 4.2.21 to 4.2.23

CVE-2025-48432 (medium severity) is fixed in 4.2.22, released 6/4/25:
https://nvd.nist.gov/vuln/detail/cve-2025-48432
https://docs.djangoproject.com/en/5.2/releases/4.2.22/

There's also a 4.2.23 version, released 6/10/25, so we can upgrade to that as well:
https://docs.djangoproject.com/en/5.2/releases/4.2.23/

Author: chosak

requirements/base.txt

@@ -1,7 +1,7 @@
 beautifulsoup4==4.12.3
 click==8.1.7
 cssselect==1.2.0
-Django==4.2.21
+Django==4.2.23
 dj-database-url==2.2.0
 django-click==2.4.0
 django-debug-toolbar==4.4.6