Bump azure-identity from 1.15.0 to 1.16.0 in /it/python

Bumps [azure-identity](https://github.com/Azure/azure-sdk-for-python) from 1.15.0 to 1.16.0.
- [Release notes](https://github.com/Azure/azure-sdk-for-python/releases)
- [Changelog](https://github.com/Azure/azure-sdk-for-python/blob/main/doc/esrp_release.md)
- [Commits](Azure/azure-sdk-for-python@azure-identity_1.15.0...azure-identity_1.16.0)

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

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

it/python/requirements-dev.txt

@@ -78,7 +78,7 @@ attrs==23.2.0 ; python_version >= '3.7'
 
 azure-core==1.30.1 ; python_version >= '3.7'
 
-azure-identity==1.15.0
+azure-identity==1.16.0
 
 cffi==1.16.0