Bump django-multifactor from 0.7.0 to 0.7.2 in /server

Bumps [django-multifactor](https://github.com/oliwarner/django-multifactor) from 0.7.0 to 0.7.2.
- [Release notes](https://github.com/oliwarner/django-multifactor/releases)
- [Commits](oliwarner/django-multifactor@v0.7...v0.7.2)

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

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

server/requirements.txt

@@ -10,7 +10,7 @@ django-cors-headers==4.4.*
 django-decorator-include==3.0
 django-extensions==3.2.*
 django-formset-js-improved
-django-multifactor==0.7.0
+django-multifactor==0.7.2
 djangorestframework==3.15.*
 emoji==2.14.*
 icalendar==5.0.*