Bump jinja2 from 2.10.3 to 2.11.3 in /authentication/python

Bumps [jinja2](https://github.com/pallets/jinja) from 2.10.3 to 2.11.3.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/master/CHANGES.rst)
- [Commits](pallets/jinja@2.10.3...2.11.3)

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

Author: dependabot[bot]

authentication/python/requirements.txt

@@ -4,7 +4,7 @@ Click==7.0
 Flask==1.1.1
 idna==2.8
 itsdangerous==1.1.0
-Jinja2==2.10.3
+Jinja2==2.11.3
 MarkupSafe==1.1.1
 oauthlib==3.1.0
 PyYAML==5.1.2