Bump locust from 1.4.3 to 1.4.4 in /perf-tests (#1509)

Bumps [locust](https://github.com/locustio/locust) from 1.4.3 to 1.4.4.
- [Release notes](https://github.com/locustio/locust/releases)
- [Changelog](https://github.com/locustio/locust/blob/master/CHANGELOG.md)
- [Commits](locustio/locust@1.4.3...1.4.4)

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

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

perf-tests/requirements.txt

@@ -8,4 +8,4 @@ certifi==2020.12.5
 urllib3==1.26.3
 pytest-html==3.1.1
 pytest-repeat==0.9.1
-locust==1.4.3
+locust==1.4.4