Bump django from 4.2.14 to 4.2.15

Bumps [django](https://github.com/django/django) from 4.2.14 to 4.2.15.
- [Commits](django/django@4.2.14...4.2.15)

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

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

requirements.txt

@@ -2,7 +2,7 @@
 # rest is needed to support wiki pages written in rst
 Trac[babel, pygments, rest]==1.6.0
 psycopg2==2.9.9 --no-binary=psycopg2
-Django==4.2.14
+Django==4.2.15
 libsass==0.23.0
 
 # Trac plugins