update README.md.tpl format client factory (Azure#20494)

Author: Alancere

eng/tools/generator/template/rpName/packageName/README.md.tpl

@@ -33,23 +33,31 @@ cred, err := azidentity.NewDefaultAzureCredential(nil)
 
 For more information on authentication, please see the documentation for `azidentity` at [pkg.go.dev/github.com/Azure/azure-sdk-for-go/sdk/azidentity](https://pkg.go.dev/github.com/Azure/azure-sdk-for-go/sdk/azidentity).
 
-## Clients
+## Client Factory
 
-Azure {{packageTitle}} modules consist of one or more clients.  A client groups a set of related APIs, providing access to its functionality within the specified subscription.  Create one or more clients to access the APIs you require using your credential.
+Azure {{packageTitle}} module consists of one or more clients. We provide a client factory which could be used to create any client in this module.
 
 ```go
-client, err := {{packageName}}.{{NewClientName}}(<subscription ID>, cred, nil)
+clientFactory, err := {{packageName}}.NewClientFactory(<subscription ID>, cred, nil)
 ```
 
 You can use `ClientOptions` in package `github.com/Azure/azure-sdk-for-go/sdk/azcore/arm` to set endpoint to connect with public and sovereign clouds as well as Azure Stack. For more information, please see the documentation for `azcore` at [pkg.go.dev/github.com/Azure/azure-sdk-for-go/sdk/azcore](https://pkg.go.dev/github.com/Azure/azure-sdk-for-go/sdk/azcore).
 
 ```go
-options := arm.ClientOptions{
+options := arm.ClientOptions {
     ClientOptions: azcore.ClientOptions {
         Cloud: cloud.AzureChina,
     },
 }
-client, err := {{packageName}}.{{NewClientName}}(<subscription ID>, cred, &options)
+client, err := {{packageName}}.NewClientFactory(<subscription ID>, cred, &options)
+```
+
+## Clients
+
+A client groups a set of related APIs, providing access to its functionality.  Create one or more clients to access the APIs you require using client factory.
+
+```go
+client := clientFactory.{{NewClientName}}()
 ```
 
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