Bump flask from 3.0.3 to 3.1.0 in /src/publishers

Bumps [flask](https://github.com/pallets/flask) from 3.0.3 to 3.1.0.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@3.0.3...3.1.0)

---
updated-dependencies:
- dependency-name: flask
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/publishers/requirements.txt

@@ -1,5 +1,5 @@
 envelope==2.0.5
-Flask==3.0.3
+Flask==3.1.0
 Flask-Cors==5.0.0
 Flask-RESTful==0.3.10
 gevent==24.11.1