Bump django-autocomplete-light from 3.5.1 to 3.9.4

Bumps [django-autocomplete-light](https://github.com/yourlabs/django-autocomplete-light) from 3.5.1 to 3.9.4.
- [Release notes](https://github.com/yourlabs/django-autocomplete-light/releases)
- [Changelog](https://github.com/yourlabs/django-autocomplete-light/blob/master/CHANGELOG)
- [Commits](yourlabs/django-autocomplete-light@3.5.1...3.9.4)

---
updated-dependencies:
- dependency-name: django-autocomplete-light
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -64,7 +64,7 @@ dj-database-url==0.5.0
 dj-pagination==2.5.0
 django-floppyforms<1.10.0
 django-forms-bootstrap<=3.1.0
-django-autocomplete-light==3.5.1
+django-autocomplete-light==3.9.4
 django-invitations<1.9.4
 django-recaptcha==2.0.6