cleaned up the text on content-type map

Author: micheldumontier

versions/3.0.0.md

@@ -265,7 +265,6 @@ license:
   url: http://www.apache.org/licenses/LICENSE-2.0.html
 version: 1.0.1
 x-accessRestriction: none
-x-maturity: production
 x-implementationLanguage: python
 ```
 
@@ -378,6 +377,7 @@ A single server would be described as:
 url: https://development.gigantic-server.com/v1
 description: Development server
 x-___location: California, USA
+x-maturity: production
 ```
 
 The following shows how multiple servers can be described, for example, at the OpenAPI Object's [`servers`](#oasServers):
@@ -1777,7 +1777,7 @@ This object MAY be extended with [Specification Extensions](#specificationExtens
 ##### smartAPI Fields
 Field Name | Type | Description
 ---|:---:|---
-<a name="responseContent"></a>content | Map[`string`, [Media Type Object](#mediaTypeObject)] | A map containing descriptions of potential response payloads. The key is the media type and the value is used to describe it.The media type definitions should be in compliance with <a href="http://tools.ietf.org/html/rfc6838">RFC6838</a>.
+<a name="responseContent"></a>content | Map[`string`, [Media Type Object](#mediaTypeObject)] | **SHOULD** Use media type definitions listed at <a href="https://www.iana.org/assignments/media-types/media-types.xhtml">RFC6838</a>.
 <a name="responseProfile"></a>x-responseSchema| `URI` | Conformance to a particular schema/format.
 <a name="responseDataType"></a>x-responseValueType | [`responseValueType object`] | To specify the types of objects in the response. The responseValueType object consists of a required `x-valueType` that should provide URI values to the type of object, and an optional `x-path` to specify to ___location in the response for that valueType.
 <a name="x-JSONLDContext"></a>x-JSONLDContext | `URI` | JSON LD context.