Bump werkzeug from 0.14.1 to 2.3.8 in /leaderboard

Bumps [werkzeug](https://github.com/pallets/werkzeug) from 0.14.1 to 2.3.8.
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](pallets/werkzeug@0.14.1...2.3.8)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

leaderboard/requirements.txt

@@ -21,4 +21,4 @@ PyYAML==3.12
 requests==2.18.4
 urllib3==1.26.5
 uWSGI==2.0.15
-Werkzeug==0.14.1
+Werkzeug==2.3.8