docs: add test PR note to README

Co-authored-by: tpellissier-msft <227695833+tpellissier-msft@users.noreply.github.com>

Author: Copilot

README.md

@@ -6,6 +6,8 @@
 
 A Python client library for Microsoft Dataverse that provides a unified interface for CRUD operations, SQL queries, table metadata management, and file uploads through the Dataverse Web API.
 
+<!-- Test PR: this line verifies the PR workflow is functioning correctly. -->
+
 **[Source code](https://github.com/microsoft/PowerPlatform-DataverseClient-Python)** | **[Package (PyPI)](https://pypi.org/project/PowerPlatform-Dataverse-Client/)** | **[API reference documentation](https://learn.microsoft.com/python/api/dataverse-sdk-docs-python/dataverse-overview?view=dataverse-sdk-python-latest)** | **[Product documentation](https://learn.microsoft.com/power-apps/developer/data-platform/sdk-python/)** | **[Samples](https://github.com/microsoft/PowerPlatform-DataverseClient-Python/tree/main/examples)**
 
 > [!IMPORTANT]