Bump cffi from 1.15.1 to 1.16.0 in /it/python

Bumps [cffi](https://github.com/python-cffi/cffi) from 1.15.1 to 1.16.0.
- [Release notes](https://github.com/python-cffi/cffi/releases)
- [Commits](python-cffi/cffi@v1.15.1...v1.16.0)

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

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

it/python/requirements-dev.txt

@@ -80,7 +80,7 @@ azure-core==1.29.4 ; python_version >= '3.7'
 
 azure-identity==1.14.0
 
-cffi==1.15.1
+cffi==1.16.0
 
 cryptography==41.0.4 ; python_version >= '3.7'