Update Get-AzDataCollectionRule.md (#17586)

Existing DCR Overview URL goes to 404. Updated to current URL.

Author: enevoj

src/Monitor/Monitor/help/Get-AzDataCollectionRule.md

@@ -47,7 +47,7 @@ Get-AzDataCollectionRule
 ## DESCRIPTION
 The **Get-AzDataCollectionRule** cmdlet gets one or more data collection rules.
 
-Data Collection Rules (DCR) define data coming into Azure Monitor and specify where that data should be sent or stored. Here is the complete [DCR overview article](https://docs.microsoft.com/azure/azure-monitor/platform/data-collection-rule-overview).
+Data Collection Rules (DCR) define data coming into Azure Monitor and specify where that data should be sent or stored. Here is the complete [DCR overview article](https://docs.microsoft.com/azure/azure-monitor/essentials/data-collection-rule-overview).
 
 ## EXAMPLES