docs: specify tested framework versions in python tutorials

[f-atwi]

Describe your changes.

---

• I've followed the contribution guidelines.
• I've signed the CLA.
• I've successfully run make lint && make test.
• I've added or updated any relevant documentation.
• In documents I changed, I added a meta description if one was missing.
• I've updated the relevant release notes.

[erinecon]

WDYT about moving this note into the "What you'll do" section, updating the first step to say something like:

#. Create a Django app (tested with Django 5.1.4).

If you agree, I think we should do this for all 3 tutorials :)

[medubelko]

I like this. I would tweak the wording:

Create a Django app with Django 5.1.4.

But that's a nit.