Bump django-debug-toolbar from 1.9.1 to 1.11.1 in /desktop/core

Bumps [django-debug-toolbar](https://github.com/jazzband/django-debug-toolbar) from 1.9.1 to 1.11.1.
- [Release notes](https://github.com/jazzband/django-debug-toolbar/releases)
- [Changelog](https://github.com/jazzband/django-debug-toolbar/blob/1.11.1/docs/changes.rst)
- [Commits](https://github.com/jazzband/django-debug-toolbar/compare/1.9.1...1.11.1)

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

desktop/core/requirements.txt

@@ -18,7 +18,7 @@ django_celery_results==1.0.4
 django-cors-headers==3.7.0
 django-crequest==2018.5.11
 django-debug-panel==0.8.3
-django-debug-toolbar==1.9.1
+django-debug-toolbar==1.11.1
 django-extensions==1.8.0
 django-ipware==3.0.2
 django-nose==1.4.7