Bump jinja2 from 2.11.3 to 3.1.3

Bumps [jinja2](https://github.com/pallets/jinja) from 2.11.3 to 3.1.3.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/main/CHANGES.rst)
- [Commits](pallets/jinja@2.11.3...3.1.3)

---
updated-dependencies:
- dependency-name: jinja2
  dependency-type: direct:production
...

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

requirements.txt

@@ -4,7 +4,7 @@ docutils==0.14
 sphinx_rtd_theme
 sphinx-intl==2.0.0
 sphinx-sitemap==1.0.2
-Jinja2==2.11.3
+Jinja2==3.1.3
 GitPython==3.1.41
 sphinx-tabs
 sphinx-copybutton