Bump gevent from 22.10.2 to 23.9.1 in /embedding

Bumps [gevent](https://github.com/gevent/gevent) from 22.10.2 to 23.9.1.
- [Release notes](https://github.com/gevent/gevent/releases)
- [Changelog](https://github.com/gevent/gevent/blob/master/docs/changelog_pre.rst)
- [Commits](gevent/gevent@22.10.2...23.9.1)

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

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

embedding/requirements.txt

@@ -41,7 +41,7 @@ Flask==2.2.5
 Flask-Cors==3.0.10
 fonttools==4.38.0
 ftfy==6.1.1
-gevent==22.10.2
+gevent==23.9.1
 greenlet==2.0.2
 h11==0.14.0
 h5py==3.8.0