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>

Author: dependabot[bot]

docs/requirements.txt

@@ -10,7 +10,7 @@ matplotlib==3.3.1
 sphinx==4.0.2
 docutils
 readthedocs-sphinx-ext
-Jinja2==3.1.3
+Jinja2==3.1.4
 nbsphinx<0.8.7
 ipython
 anndata