Bump flask from 3.1.2 to 3.1.3 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 3.1.2 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@3.1.2...3.1.3)

---
updated-dependencies:
- dependency-name: flask
  dependency-version: 3.1.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: all
...

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

Author: dependabot[bot]

samples/volumes/src/requirements.txt

@@ -1 +1 @@
-Flask===3.1.2
+Flask===3.1.3