Bump jinja2 in /ClassExamples/ON62/flask-SQLite-CRUD-Heroku

Bumps [jinja2](https://github.com/pallets/jinja) from 2.11.2 to 2.11.3.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/master/CHANGES.rst)
- [Commits](pallets/jinja@2.11.2...2.11.3)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

ClassExamples/ON62/flask-SQLite-CRUD-Heroku/requirements.txt

@@ -2,6 +2,6 @@ Flask_SQLAlchemy==2.3.2
 Flask==1.0.2
 gunicorn==19.9.0
 itsdangerous==1.1.0
-Jinja2==2.11.2
+Jinja2==2.11.3
 MarkupSafe==1.1.1
 Werkzeug==1.0.1