Bump django from 4.2.17 to 4.2.18 in /infra

Bumps [django](https://github.com/django/django) from 4.2.17 to 4.2.18.
- [Commits](django/django@4.2.17...4.2.18)

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

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

Author: dependabot[bot]

infra/requirements-core.txt

@@ -8,7 +8,7 @@ django-registration==3.3
 django-social-share==2.3.0
 django-sortedm2m==3.1.1
 django-storages==1.13.2
-Django==4.2.17
+Django==4.2.18
 rcvformats==0.0.42
 selenium==4.25.0
 psycopg2-binary==2.9.6