Bump jinja2 from 3.1.2 to 3.1.5 in /app/ch16_mongodb/final

Bumps [jinja2](https://github.com/pallets/jinja) from 3.1.2 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@3.1.2...3.1.5)

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

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

Author: dependabot[bot]

app/ch16_mongodb/final/requirements.txt

@@ -16,7 +16,7 @@ flask==3.0.0
     # via -r requirements.piptools
 itsdangerous==2.1.2
     # via flask
-jinja2==3.1.2
+jinja2==3.1.5
     # via flask
 mako==1.3.0
     # via alembic