Bump ipython from 7.22.0 to 7.31.1 in /backend

Bumps [ipython](https://github.com/ipython/ipython) from 7.22.0 to 7.31.1.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@7.22.0...7.31.1)

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

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

Author: dependabot[bot]

backend/requirements.txt

@@ -12,7 +12,7 @@ djangorestframework-filters==1.0.0.dev2
 git+git://github.com/magenta-aps/[email protected]
 djangorestframework_simplejwt==4.6.0
 whitenoise==5.2.0
-ipython==7.22.0
+ipython==7.31.1
 WeasyPrint==52.4
 python-dateutil==2.8.1
 django-constance[database]==2.8.0