Add external material link to the Django doc page

[flovntp]

Where on docs.platform.sh should be changed?

https://docs.upsun.com/get-started/stacks/django.html

What exactly should be updated?

These external resources could be added to the blogs list of the django guide:

• https://www.linkedin.com/posts/roberttdouglass_develop-django-locally-postgresql-and-redis-activity-7223647199593668608-3wlN?utm_source=share&utm_medium=member_desktop
• https://www.linkedin.com/posts/roberttdouglass_background-tasks-using-celery-with-redis-activity-7223384209992675329-tfGu?utm_source=share&utm_medium=member_desktop

Additional context

No response