chore(deps): bump djangorestframework from 3.11.0 to 3.11.2 in /rootfs

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.11.0 to 3.11.2.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](encode/django-rest-framework@3.11.0...3.11.2)

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

Author: dependabot[bot]

rootfs/requirements.txt

@@ -4,7 +4,7 @@ django==2.2.18
 django-auth-ldap==2.2.0
 django-cors-middleware==1.5.0
 django-guardian==2.3.0
-djangorestframework==3.11.0
+djangorestframework==3.11.2
 docker==4.2.2
 gunicorn==20.0.4
 idna==2.10