Bump jinja2 from 3.1.4 to 3.1.5 in /contrib/mbedtls/docs

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: indirect
...

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

contrib/mbedtls/docs/requirements.txt

@@ -27,7 +27,7 @@ imagesize==1.4.1
     # via sphinx
 importlib-metadata==8.0.0
     # via sphinx
-jinja2==3.1.4
+jinja2==3.1.5
     # via sphinx
 markdown-it-py==3.0.0
     # via rich