Bump django from 4.2.5 to 4.2.6 in /.github/dependabot

Bumps [django](https://github.com/django/django) from 4.2.5 to 4.2.6.
- [Commits](django/django@4.2.5...4.2.6)

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

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

.github/dependabot/constraints.txt

@@ -1,4 +1,4 @@
-Django==4.2.5
+Django==4.2.6
 GitPython==3.1.37
 Pillow==10.0.1
 PyPDF2==3.0.1