Bump eventlet from 0.38.2 to 0.39.0 in /server

Bumps [eventlet](https://github.com/eventlet/eventlet) from 0.38.2 to 0.39.0.
- [Changelog](https://github.com/eventlet/eventlet/blob/master/NEWS)
- [Commits](eventlet/eventlet@0.38.2...0.39.0)

---
updated-dependencies:
- dependency-name: eventlet
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

server/requirements/base.txt

@@ -3,7 +3,7 @@ mysqlclient==2.2.7
 PyYAML==6.0.2
 SQLAlchemy==2.0.37
 cryptography==44.0.0
-eventlet==0.38.2
+eventlet==0.39.0
 flask-jsonschema-validator==0.0.4
 flask-mailman==1.1.1
 flask==3.1.0