Bump django from 5.1.5 to 5.1.6

Bumps [django](https://github.com/django/django) from 5.1.5 to 5.1.6.
- [Commits](django/django@5.1.5...5.1.6)

---
updated-dependencies:
- dependency-name: django
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]