Update enum and default type for server variables

Author: webron

versions/3.0.md

@@ -388,8 +388,8 @@ An object representing a Server Variable for server URL template substituion.
 
 Field Name | Type | Description
 ---|:---:|---
-<a name="serverVariableEnum"></a>enum | [`primitive`] | An enumeration of primitive type values to be used if the substitution options are from a limited set.
-<a name="serverVariableDefault"></a>default | `primitive` |  **Required.** The default value to use for substitution if an alternate value is not specified, and will be sent if an alternative value is _not_ supplied. Unlike the [Schema Object's](#schemaObject) `default`, this value MUST be provided by the consumer.
+<a name="serverVariableEnum"></a>enum | [`string`] | An enumeration of primitive type values to be used if the substitution options are from a limited set.
+<a name="serverVariableDefault"></a>default | `string` |  **Required.** The default value to use for substitution if an alternate value is not specified, and will be used if an alternative value is _not_ supplied. Unlike the [Schema Object's](#schemaObject) `default`, this value MUST be provided by the consumer.
 <a name="serverVariableDescription"></a>description | `string` | An optional description for the server variable.
 
 This object can be extended with [Specification Extensions](#specificationExtensions).