Bump django-modeltranslation from 0.18.11 to 0.20.3

Bumps [django-modeltranslation](https://github.com/deschler/django-modeltranslation) from 0.18.11 to 0.20.3.
- [Release notes](https://github.com/deschler/django-modeltranslation/releases)
- [Changelog](https://github.com/deschler/django-modeltranslation/blob/master/CHANGELOG.md)
- [Commits](deschler/django-modeltranslation@v0.18.11...v0.20.3)

---
updated-dependencies:
- dependency-name: django-modeltranslation
  dependency-version: 0.20.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements/base.txt

@@ -38,7 +38,7 @@ python-dateutil==2.9.0.post0
 argon2-cffi==25.1.0
 
 # I18n
-django-modeltranslation==0.18.11
+django-modeltranslation==0.20.3
 
 # CORS
 django-cors-headers==4.9.0