chore(deps): bump flask from 1.0.3 to 2.3.2 in /server

Bumps [flask](https://github.com/pallets/flask) from 1.0.3 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@1.0.3...2.3.2)

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

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

Author: dependabot[bot]

server/requirements.txt

@@ -1,6 +1,6 @@
 git+https://github.com/jamalex/notion-py.git
 flake8==3.7.7
-Flask==1.0.3
+Flask==2.3.2
 gunicorn==19.9.0
 Flask-APScheduler==1.11.0
 requests==2.22.0