Fix README example

The README example missed an import, and used the wrong casing for `TableName` field.

Author: jasdel

README.md

@@ -30,6 +30,7 @@ This example shows how you can use the v2 SDK to make an API request using the S
 package main
 
 import (
+	"github.com/aws/aws-sdk-go-v2/aws"
 	"github.com/aws/aws-sdk-go-v2/aws/endpoints"
 	"github.com/aws/aws-sdk-go-v2/aws/external"
 	"github.com/aws/aws-sdk-go-v2/service/dynamodb"
@@ -52,7 +53,7 @@ func main() {
 
 	// Build the request with its input parameters
 	req := svc.DescribeTableRequest(&dynamodb.DescribeTableInput{
-		Tablename: aws.String("myTable"),
+		TableName: aws.String("myTable"),
 	})
 
 	// Send the request, and get the response or error back