Fixed dead link to the DCR Overview (#17998)

Author: bb-froggy

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

@@ -30,7 +30,7 @@ New-AzDataCollectionRule
 ## DESCRIPTION
 The **New-AzDataCollectionRule** cmdlet creates a data collection rule.
 
-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).
 
 To use the -RuleFile parameter, construct a json file containing three properties: dataSources, destinations, dataFlows (see Example #1)