Bump jinja2 in /ClassExamples/ON47/StudentPassFail_Flask/test

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/ON47/StudentPassFail_Flask/test/requirements.txt

@@ -2,7 +2,7 @@ click==7.1.2
 Flask==1.1.2
 h5py==2.10.0
 itsdangerous==1.1.0
-Jinja2==2.11.2
+Jinja2==2.11.3
 Keras==2.4.3
 Keras-Preprocessing==1.0.5
 MarkupSafe==1.1.1