AGW: Update first recommendation for minimum instance count. (Azure#124)

Co-authored-by: Eric Henry <[email protected]>

azure-resources/Network/applicationGateways/recommendations.yaml

@@ -1,12 +1,12 @@
-- description: Set a minimum instance count of 2
+- description: Ensure autoscale has been enabled
   aprlGuid: 823b0cff-05c0-2e4e-a1e7-9965e1cfa16f
   recommendationTypeId: null
   recommendationControl: Scalability
   recommendationImpact: High
   recommendationResourceType: Microsoft.Network/applicationGateways
   recommendationMetadataState: Active
   longDescription: |
-    Azure Application Gateways v2 are deployed highly available with multiple instances by default.
+    Azure Application Gateways v2 are always deployed in a highly available fashion with multiple instances by default. Enabling autoscale ensures the service is not reliant on manual intervention for scaling.
   potentialBenefits: Enhances uptime and enables autoscaling
   pgVerified: true
   publishedToLearn: false