Bump flask from 3.0.3 to 3.1.2

Bumps [flask](https://github.com/pallets/flask) from 3.0.3 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@3.0.3...3.1.2)

---
updated-dependencies:
- dependency-name: flask
  dependency-version: 3.1.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,7 +1,7 @@
 apistar==0.7.2
 bump2version==1.0.1
 Click==8.1.8
-Flask==3.0.3
+Flask==3.1.2
 Flask-RESTful==0.3.10
 gunicorn==23.0.0
 imagemounter_mitre

setup.py

@@ -15,7 +15,7 @@
 
 REQUIRED = [
     "Click",
-    "Flask==3.0.3",
+    "Flask==3.1.2",
     "Flask-RESTful",
     "gunicorn",
     "imagemounter_mitre",