Bump cryptography in /GUI/panel-examples/apps/django_multi_apps

Bumps [cryptography](https://github.com/pyca/cryptography) from 2.8 to 3.2.
- [Release notes](https://github.com/pyca/cryptography/releases)
- [Changelog](https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst)
- [Commits](pyca/cryptography@2.8...3.2)

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

Author: dependabot[bot]

GUI/panel-examples/apps/django_multi_apps/requirements.txt

@@ -7,7 +7,7 @@ cffi==1.13.2
 channels==2.4.0
 colorcet==2.0.2
 constantly==15.1.0
-cryptography==2.8
+cryptography==3.2
 daphne==2.4.1
 Django==3.0.3
 holoviews==1.13.2