Bump flask from 3.1.1 to 3.1.2

Bumps [flask](https://github.com/pallets/flask) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@3.1.1...3.1.2)

---
updated-dependencies:
- dependency-name: flask
  dependency-version: 3.1.2
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

poetry.lock

@@ -41,7 +41,7 @@ requests = "^2.32.4"
 types-requests = "^2.32.4.20250611"
 pyyaml = "^6.0.1"
 types-pyyaml = "^6.0.12.20250516"
-flask = "^3.1.1"
+flask = "^3.1.2"
 pytest-mypy-plugins = "^3.0.0"
 ruff = "^0.12.7"