Bump cffi from 1.12.3 to 1.14.5 in /perf-tests (#1375)

Bumps [cffi](https://github.com/python-cffi/release-doc) from 1.12.3 to 1.14.5.
- [Release notes](https://github.com/python-cffi/release-doc/releases)
- [Commits](https://github.com/python-cffi/release-doc/commits)

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

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

Author: dependabot[bot]

perf-tests/requirements.txt

@@ -3,7 +3,7 @@ requests==2.25.1
 kubernetes==8.0.1
 pytest==4.4.1
 ipaddress==1.0.23 # >= 1.0.17
-cffi==1.12.3
+cffi==1.14.5
 certifi==2020.12.5
 urllib3==1.26.3
 pytest-html==2.1.1