Update dependency Django to v4.2.6

This MR contains the following updates:

Package	Update	Change
Django (source, changelog)	patch	==4.2.4 -> ==4.2.6

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Release Notes

django/django (Django)

v4.2.6

Compare Source

v4.2.5

Compare Source

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requirements.txt

-Django==4.2.4
+Django==4.2.6
 django-bootstrap5==23.3
 fontawesomefree==6.4.2 # Makes static files (css, fonts) available locally
 django-fontawesome-6==1.0.0.0 # Provides an icon field for models and forms as well as handy shortcuts to render icons