Bump the pip group with 4 updates

Bumps the pip group with 4 updates: [flask](https://github.com/pallets/flask), [requests](https://github.com/psf/requests), [gunicorn](https://github.com/benoitc/gunicorn) and [gevent](https://github.com/gevent/gevent).


Updates `flask` from 1.1.2 to 2.2.5
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@1.1.2...2.2.5)

Updates `requests` from 2.25.1 to 2.32.2
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.25.1...v2.32.2)

Updates `gunicorn` from 20.0.4 to 22.0.0
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@20.0.4...22.0.0)

Updates `gevent` from 21.1.2 to 23.9.0
- [Release notes](https://github.com/gevent/gevent/releases)
- [Changelog](https://github.com/gevent/gevent/blob/master/docs/changelog_pre.rst)
- [Commits](gevent/gevent@21.1.2...23.9.0)

---
updated-dependencies:
- dependency-name: flask
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: requests
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: gunicorn
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: gevent
  dependency-type: direct:production
  dependency-group: pip
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,7 +1,7 @@
-Flask==1.1.2
+Flask==2.2.5
 simplejson==3.17.2
 python-dotenv==0.15.0
-requests==2.25.1
-gunicorn==20.0.4
-gevent==21.1.2
+requests==2.32.2
+gunicorn==22.0.0
+gevent==23.9.0
 biopython==1.78