Bump django from 4.2.21 to 4.2.26 in /requirements

Bumps [django](https://github.com/django/django) from 4.2.21 to 4.2.26.
- [Commits](django/django@4.2.21...4.2.26)

---
updated-dependencies:
- dependency-name: django
  dependency-version: 4.2.26
  dependency-type: direct:production
...

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Author: dependabot[bot]