Bump flask from 2.2.5 to 3.1.0 in /samples/volumes/src in the all group

Bumps the all group in /samples/volumes/src with 1 update: [flask](https://github.com/pallets/flask).


Updates `flask` from 2.2.5 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@2.2.5...3.1.0)

---
updated-dependencies:
- dependency-name: flask
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: all
...

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

samples/volumes/src/requirements.txt

@@ -1 +1 @@
-Flask===2.2.5
+Flask===3.1.0