Bump werkzeug from 0.16.0 to 2.2.3 in /tekton/webhook

Bumps [werkzeug](https://github.com/pallets/werkzeug) from 0.16.0 to 2.2.3.
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](https://github.com/pallets/werkzeug/compare/0.16.0...2.2.3

)

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

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

tekton/webhook/requirements.txt

@@ -4,5 +4,5 @@ gunicorn==20.0.4
 itsdangerous==1.1.0
 Jinja2==2.11.3
 MarkupSafe==1.1.1
-Werkzeug==0.16.0
+Werkzeug==2.2.3