build(deps): bump jinja2

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
...

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

backstage-reference/templates/example-python-flask/content/requirements.txt

@@ -1,7 +1,7 @@
 click==8.1.3
 Flask==2.3.3
 itsdangerous==2.1.2
-Jinja2==3.1.4
+Jinja2==3.1.5
 MarkupSafe==2.1.2
 Werkzeug==3.0.6
 gunicorn==22.0.0