Bump flask from 2.1.2 to 2.3.2 (#250)

Bumps [flask](https://github.com/pallets/flask) from 2.1.2 to 2.3.2.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](https://github.com/pallets/flask/compare/2.1.2...2.3.2)

---
updated-dependencies:
- dependency-name: flask
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -1,7 +1,7 @@
 cryptography==41.0.1
-Flask==2.1.2
+Flask==2.3.2
 itsdangerous==2.1.2
 Jinja2==3.1.2
 MarkupSafe==2.1.1
 redis==4.5.3
-Werkzeug==2.2.3
+Werkzeug==2.3.3