Bump jinja2 from 2.11.1 to 2.11.3

Bumps [jinja2](https://github.com/pallets/jinja) from 2.11.1 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@2.11.1...2.11.3)

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

Author: dependabot[bot]

requirements.txt

@@ -16,7 +16,7 @@ importlib-metadata==1.5.0
 ipython==7.13.0
 ipython-genutils==0.2.0
 jedi==0.16.0
-Jinja2==2.11.1
+Jinja2==2.11.3
 livereload==2.6.1
 lunr==0.5.6
 Markdown==3.2.1