Bump ipython from 7.9.0 to 7.13.0 in /config/web

Bumps [ipython](https://github.com/ipython/ipython) from 7.9.0 to 7.13.0.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@7.9.0...7.13.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

config/web/requirements.txt

@@ -4,7 +4,7 @@ gunicorn==20.0.4
 psycopg2==2.8.5
 
 # ipython:
-ipython==7.9.0
+ipython==7.13.0
 
 # GraphQL:
 graphene-django==2.6.0