Bump werkzeug from 0.16.1 to 3.1.5

Bumps [werkzeug](https://github.com/pallets/werkzeug) from 0.16.1 to 3.1.5.
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](pallets/werkzeug@0.16.1...3.1.5)

---
updated-dependencies:
- dependency-name: werkzeug
  dependency-version: 3.1.5
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -21,5 +21,5 @@ requests>=2.23.0
 WTForms==2.2.1
 APScheduler==3.6.1
 passlib==1.7.1
-Werkzeug==0.16.1
+Werkzeug==3.1.5
 tzlocal<3.0 # Fix based on https://github.com/Yelp/elastalert/issues/2968