build(deps): bump django-leaflet from 0.28.0 to 0.28.1

Bumps [django-leaflet](https://github.com/makinacorpus/django-leaflet) from 0.28.0 to 0.28.1.
- [Release notes](https://github.com/makinacorpus/django-leaflet/releases)
- [Changelog](https://github.com/makinacorpus/django-leaflet/blob/master/CHANGES)
- [Commits](makinacorpus/django-leaflet@0.28.0...0.28.1)

---
updated-dependencies:
- dependency-name: django-leaflet
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

{{cookiecutter.project_slug}}/requirements.txt

@@ -107,7 +107,7 @@ django-filter==2.4.0
     # via wagtail
 django-intl-tel-input==0.3.1
     # via -r {{cookiecutter.project_slug}}/requirements.in
-django-leaflet==0.28.0
+django-leaflet==0.28.1
     # via -r {{cookiecutter.project_slug}}/requirements.in
 django-maintenancemode-2==1.2
     # via -r {{cookiecutter.project_slug}}/requirements.in