docs: clarify AWS::Serverless::SimpleTable.PrimaryKey Default Value (#1090)

Author: chrisoverzero

versions/2016-10-31.md

@@ -313,7 +313,7 @@ The `AWS::Serverless::SimpleTable` resource creates a DynamoDB table with a sing
 
 Property Name | Type | Description
 ---|:---:|---
-PrimaryKey | [Primary Key Object](#primary-key-object) | Attribute name and type to be used as the table's primary key. **This cannot be modified without replacing the resource.** Defaults to `String` attribute named ID.
+PrimaryKey | [Primary Key Object](#primary-key-object) | Attribute name and type to be used as the table's primary key. **This cannot be modified without replacing the resource.** Defaults to `String` attribute named `id`.
 ProvisionedThroughput | [Provisioned Throughput Object](http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-dynamodb-provisionedthroughput.html) | Read and write throughput provisioning information. If ProvisionedThroughput is not specified BillingMode will be specified as PAY_PER_REQUEST
 Tags | Map of `string` to `string` | A map (string to string) that specifies the tags to be added to this table. Keys and values are limited to alphanumeric characters. 
 TableName | `string` | Name for the DynamoDB Table
@@ -712,7 +712,7 @@ The object describing the properties of a primary key.
 Property Name | Type | Description
 ---|:---:|---
 Name | `string` | Attribute name of the primary key. Defaults to `id`.
-Type | `string` | Attribute type of the primary key. MUST be one of `String`, `Number`, or `Binary`.
+Type | `string` | Attribute type of the primary key. MUST be one of `String`, `Number`, or `Binary`. Defaults to `String`.
 
 ##### Example: Primary key object