chore(deps): Bump werkzeug in /examples/knative/python/kn-py-echo

Bumps [werkzeug](https://github.com/pallets/werkzeug) from 2.1.2 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@2.1.2...2.2.3)

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

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

examples/knative/python/kn-py-echo/requirements.txt

@@ -9,6 +9,6 @@ Flask==2.1.2
   itsdangerous==2.1.2
   Jinja2==3.1.2
     MarkupSafe==2.1.1
-  Werkzeug==2.1.2
+  Werkzeug==2.2.3
 pip==21.1
 setuptools==65.5.1