Fix type in the README

Author: ArthurMa1978

sdk/resourcemanager/Azure.ResourceManager/README.md

@@ -145,10 +145,10 @@ Console.WriteLine($"Vnet: {id.Parent.Name}");
 Console.WriteLine($"Subnet: {id.Name}");
 ```
 
-## Managing Existing Resources by Resouce Identifier
+## Managing Existing Resources by Resource Identifier
 Performing operations on resources that already exist is a common use case when using the management client libraries. In this scenario, you usually have the identifier of the resource you want to work on as a string. Although the new object hierarchy is great for provisioning, and working within the scope of a given parent, it isn't the most efficient when it comes to this specific scenario.  
 
-Here's an example how you can access an `AvailabilitySet` object and manage it directly with its id: 
+Here's an example how you can access an `AvailabilitySet` object and manage it directly with its ID: 
 ```C# Snippet:Readme_ManageAvailabilitySetOld
 ResourceIdentifier id = new ResourceIdentifier("/subscriptions/aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee/resourceGroups/workshop2021-rg/providers/Microsoft.Compute/availabilitySets/ws2021availSet");
 // We construct a new client to work with