updated help files

Author: solankisamir

src/ApiManagement/ApiManagement/help/Get-AzApiManagementProduct.md

@@ -31,6 +31,12 @@ Get-AzApiManagementProduct -Context <PsApiManagementContext> [-Title <String>]
  [-DefaultProfile <IAzureContextContainer>] [<CommonParameters>]
 ```
 
+### GetByApiId
+```
+Get-AzApiManagementProduct -Context <PsApiManagementContext> [-ApiId <String>]
+ [-DefaultProfile <IAzureContextContainer>] [<CommonParameters>]
+```
+
 ## DESCRIPTION
 The **Get-AzApiManagementProduct** cmdlet gets a list or a particular product.
 
@@ -54,6 +60,21 @@ This command get an API Management product by ID.
 
 ## PARAMETERS
 
+### -ApiId
+ApiId of the Api to find the correlated products. This parameter is optional.
+
+```yaml
+Type: System.String
+Parameter Sets: GetByApiId
+Aliases:
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: True (ByPropertyName)
+Accept wildcard characters: False
+```
+
 ### -Context
 Specifies an instance of a **PsApiManagementContext** object.
 

src/ApiManagement/ApiManagement/help/Get-AzApiManagementSubscription.md

@@ -207,7 +207,7 @@ Scope identifier. The Scope of the Subscription, whether it is Api Scope /apis/{
 
 ```yaml
 Type: System.String
-Parameter Sets: GetByApiId
+Parameter Sets: GetByScope
 Aliases:
 
 Required: True