Bump jinja2 from 3.1.5 to 3.1.6 in /tekton/webhook

Bumps [jinja2](https://github.com/pallets/jinja) from 3.1.5 to 3.1.6.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/main/CHANGES.rst)
- [Commits](pallets/jinja@3.1.5...3.1.6)

---
updated-dependencies:
- dependency-name: jinja2
  dependency-version: 3.1.6
  dependency-type: direct:production
...

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

Author: dependabot[bot]

tekton/webhook/requirements.txt

@@ -2,7 +2,7 @@ Click==7.0
 Flask==2.3.2
 gunicorn==23.0.0
 itsdangerous==1.1.0
-Jinja2==3.1.5
+Jinja2==3.1.6
 MarkupSafe==1.1.1
 Werkzeug==3.0.6