build(deps-dev): bump locust from 2.17.0 to 2.20.0

Bumps [locust](https://github.com/locustio/locust) from 2.17.0 to 2.20.0.
- [Release notes](https://github.com/locustio/locust/releases)
- [Changelog](https://github.com/locustio/locust/blob/master/CHANGELOG.md)
- [Commits](locustio/locust@2.17.0...2.20.0)

---
updated-dependencies:
- dependency-name: locust
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

setup.py

@@ -146,7 +146,7 @@ def merge_req_lists(*req_lists: List[str]) -> List[str]:
     "fastapi==0.103.1",
     "uvicorn==0.23.1",
     "websockets==11.0.2",
-    "locust==2.17.0",
+    "locust==2.20.0",
     "streamlit==1.27.0",
     "streamlit-chat==0.1.1",
 ]