build(deps): Bump flask from 1.1.1 to 1.1.2 in /backend

Bumps [flask](https://github.com/pallets/flask) from 1.1.1 to 1.1.2.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/master/CHANGES.rst)
- [Commits](pallets/flask@1.1.1...1.1.2)

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

Author: dependabot-preview[bot]

backend/requirements.txt

@@ -2,7 +2,7 @@
 connexion==2.6.0
 datadog==0.35.0
 fakeredis==1.4.0
-Flask==1.1.1
+Flask==1.1.2
 Flask-Cors==3.0.8
 flask-talisman==0.7.0
 google-cloud-storage==1.27.0