chore(deps-dev): bump azure-identity from 1.19.0 to 1.20.0

Bumps [azure-identity](https://github.com/Azure/azure-sdk-for-python) from 1.19.0 to 1.20.0.
- [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_1.19.0...azure-identity_1.20.0)

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

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

Author: dependabot[bot]

requirements-dev.txt

@@ -8,7 +8,7 @@ attrs==25.1.0 ; python_version >= '3.7'
 
 azure-core==1.32.0 ; python_version >= '3.7'
 
-azure-identity==1.19.0
+azure-identity==1.20.0
 
 build==1.2.2.post1