Bump jinja2 from 3.1.4 to 3.1.5 in /docs (#303)

Bumps [jinja2](https://github.com/pallets/jinja) from 3.1.4 to 3.1.5.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/main/CHANGES.rst)
- [Commits](pallets/jinja@3.1.4...3.1.5)

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

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docs/requirements.txt

@@ -14,7 +14,7 @@ exceptiongroup==1.2.1
 h11==0.14.0
 idna==3.7
 imagesize==1.4.1
-jinja2==3.1.4
+jinja2==3.1.5
 markdown-it-py==3.0.0
 markupsafe==2.1.5
 mdit-py-plugins==0.4.1