Bump flask from 3.0.3 to 3.1.3 in /dashboard/docker (#14)

Bumps [flask](https://github.com/pallets/flask) from 3.0.3 to 3.1.3.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@3.0.3...3.1.3)

---
updated-dependencies:
- dependency-name: flask
  dependency-version: 3.1.3
  dependency-type: direct:production
...

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Author: dependabot[bot]

dashboard/docker/requirements.txt

@@ -4,6 +4,6 @@ dash==2.18.2
 plotly==5.24.1
 PyGithub==2.4.0
 dash_bootstrap_components==1.6.0
-flask==3.0.3
+flask==3.1.3
 gunicorn==23.0.0
 pandas==2.2.3