Bump flask from 1.1.2 to 3.0.1

Bumps [flask](https://github.com/pallets/flask) from 1.1.2 to 3.0.1.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@1.1.2...3.0.1)

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

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

authn-service/requirements.txt

@@ -4,7 +4,7 @@ chardet==3.0.4
 click==7.1.2
 cryptography==2.6.1
 entrypoints==0.3
-Flask==1.1.2
+Flask==3.0.1
 Flask-Cors==3.0.8
 idna==2.10
 django-two-factor-auth==1.12