Bump azure-core from 1.29.5 to 1.29.6 in /it/python

Bumps [azure-core](https://github.com/Azure/azure-sdk-for-python) from 1.29.5 to 1.29.6.
- [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-core_1.29.5...azure-core_1.29.6)

---
updated-dependencies:
- dependency-name: azure-core
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

it/python/requirements-dev.txt

@@ -76,7 +76,7 @@ async-timeout==4.0.3 ; python_version >= '3.6'
 
 attrs==23.1.0 ; python_version >= '3.7'
 
-azure-core==1.29.5 ; python_version >= '3.7'
+azure-core==1.29.6 ; python_version >= '3.7'
 
 azure-identity==1.15.0