Bump flask from 2.3.1 to 2.3.2 in /src (#3406)

Bumps [flask](https://github.com/pallets/flask) from 2.3.1 to 2.3.2.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@2.3.1...2.3.2)

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

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Author: dependabot[bot]

src/requirements.txt

@@ -1,4 +1,4 @@
-flask==2.3.1
+flask==2.3.2
 flask-talisman==1.0.0
 gunicorn==20.1.0
 pytest==7.3.1