Bump jinja2 from 3.1.3 to 3.1.4 in /docs

Bumps [jinja2](https://github.com/pallets/jinja) from 3.1.3 to 3.1.4.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/main/CHANGES.rst)
- [Commits](pallets/jinja@3.1.3...3.1.4)

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

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

docs/requirements.txt

@@ -5,7 +5,7 @@ chardet==4.0.0
 docutils==0.16
 idna==2.10
 imagesize==1.2.0
-Jinja2==3.1.3
+Jinja2==3.1.4
 MarkupSafe==1.1.1
 packaging==20.9
 pockets==0.9.1