[LogAnalytics] Fix broken link (Azure#23056)

Author: mccoyp

sdk/loganalytics/azure-loganalytics/README.md

@@ -2,6 +2,6 @@
 
 This package is no longer being maintained. Use the [azure-monitor-query](https://pypi.org/project/azure-monitor-query/) package instead.
 
-For migration instructions, see the [migration guide](https://azsdk/python/migrate/la-to-monitor-query).
+For migration instructions, see the [migration guide](https://aka.ms/azsdk/python/migrate/la-to-monitor-query).
 
 ![image](https://azure-sdk-impressions.azurewebsites.net/api/impressions/azure-sdk-for-python%2Fazure-loganalytics%2FREADME.png)