Bump locust from 2.5.0 to 2.5.1 in /perf-tests (#2266)

Bumps [locust](https://github.com/locustio/locust) from 2.5.0 to 2.5.1.
- [Release notes](https://github.com/locustio/locust/releases)
- [Changelog](https://github.com/locustio/locust/blob/master/CHANGELOG.md)
- [Commits](locustio/locust@2.5.0...2.5.1)

---
updated-dependencies:
- dependency-name: locust
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

perf-tests/requirements.txt

@@ -8,4 +8,4 @@ certifi==2021.10.8
 urllib3==1.26.7
 pytest-html==3.1.1
 pytest-repeat==0.9.1
-locust==2.5.0
+locust==2.5.1