Bump jinja2 in /examples/install-webhooks/backend/python

Bumps [jinja2](https://github.com/pallets/jinja) from 3.1.2 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@3.1.2...3.1.4)

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

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

examples/install-webhooks/backend/python/requirements.txt

@@ -1,4 +1,4 @@
-Jinja2==3.1.2
+Jinja2==3.1.4
 MarkupSafe==2.1.1
 Werkzeug==2.1.2
 click==8.1.3