Bump cryptography from 3.2 to 39.0.1 in /examples/yoti_example_django

Bumps [cryptography](https://github.com/pyca/cryptography) from 3.2 to 39.0.1.
- [Release notes](https://github.com/pyca/cryptography/releases)
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](pyca/cryptography@3.2...39.0.1)

---
updated-dependencies:
- dependency-name: cryptography
  dependency-type: indirect
...

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

examples/yoti_example_django/requirements.txt

@@ -14,7 +14,7 @@ cffi==1.14.0
     # via cryptography
 chardet==3.0.4
     # via requests
-cryptography==3.2
+cryptography==39.0.1
     # via
     #   pyopenssl
     #   yoti
@@ -48,7 +48,6 @@ requests==2.21.0
     #   yoti
 six==1.11.0
     # via
-    #   cryptography
     #   protobuf
     #   pyopenssl
 sqlparse==0.3.0