Replace string with azcore.ETag (#22218)

Missed one in last round of clean-up.

Author: jhendrixMSFT

sdk/data/azappconfig/client.go

@@ -444,7 +444,7 @@ func (c *Client) GetSnapshot(ctx context.Context, snapshotName string, options *
 
 	getResp, err := c.appConfigClient.GetSnapshot(ctx, snapshotName, &generated.AzureAppConfigurationClientGetSnapshotOptions{
 		IfMatch:     (*string)(options.IfMatch),
-		IfNoneMatch: options.IfNoneMatch,
+		IfNoneMatch: (*string)(options.IfNoneMatch),
 		Select:      options.Select,
 	})
 

sdk/data/azappconfig/options.go

@@ -167,7 +167,7 @@ type GetSnapshotOptions struct {
 	IfMatch *azcore.ETag
 
 	// Used to perform an operation only if the targeted resource's etag does not match the value provided.
-	IfNoneMatch *string
+	IfNoneMatch *azcore.ETag
 
 	// Used to select what fields are present in the returned resource(s).
 	Select []SnapshotFields