Update Monitor Query API ref link (Azure#21683)

Author: scottaddie

sdk/monitor/azure-monitor-query/README.md

@@ -445,7 +445,7 @@ This project has adopted the [Microsoft Open Source Code of Conduct][code_of_con
 [package]: https://aka.ms/azsdk-python-monitor-query-pypi
 [pip]: https://pypi.org/project/pip/
 [python_logging]: https://docs.python.org/3/library/logging.html
-[python-query-ref-docs]: https://docs.microsoft.com/python/api/overview/azure/monitor-query-readme?view=azure-python-preview
+[python-query-ref-docs]: https://aka.ms/azsdk/python/monitor-query/docs
 [samples]: https://github.com/Azure/azure-sdk-for-python/tree/main/sdk/monitor/azure-monitor-query/samples
 [source]: https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/monitor/azure-monitor-query/