Bump werkzeug from 1.0.1 to 2.2.3 in /examples/zoo_app (#519)

Bumps [werkzeug](https://github.com/pallets/werkzeug) from 1.0.1 to 2.2.3.
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](pallets/werkzeug@1.0.1...2.2.3)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

examples/zoo_app/requirements.txt

@@ -10,5 +10,5 @@ MarkupSafe==2.0.1
 pyrsistent==0.17.3
 pytz==2021.1
 six==1.16.0
-Werkzeug==1.0.1
+Werkzeug==2.2.3