Bump jinja2 from 3.1.1 to 3.1.3 in /docs (#640)

Bumps [jinja2](https://github.com/pallets/jinja) from 3.1.1 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@3.1.1...3.1.3)

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

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docs/requirements.txt

@@ -7,7 +7,7 @@ babel==2.9.1
 docutils==0.16
 imagesize==1.3.0
 importlib-metadata==4.11.3
-jinja2==3.1.1
+jinja2==3.1.3
 markupsafe==2.1.1
 packaging==21.3
 pygments==2.15.0