application/cwl+yaml is now official

Author: mr-c

CommandLineTool.yml

@@ -56,8 +56,7 @@ $graph:
       * CWL has been assigned an official IANA Media Type of [`application/cwl`](https://www.iana.org/assignments/media-types/application/cwl)
         for either JSON or YAML format. For JSON formatted CWL documents, [`application/cwl+json`](https://www.iana.org/assignments/media-types/application/cwl+json)
         has also been assigned and can be used. For specifying a YAML formatted
-        CWL document, one can use `application/cwl+yaml` but that is not an official
-        IANA media-type yet.
+        CWL document, one can use [`application/cwl+yaml`](https://www.iana.org/assignments/media-types/application/cwl+yaml).
         The above has been documented in the [Syntax](#Syntax) section.
       * There is now an unofficial [JSON Schema for CWL documents](https://github.com/common-workflow-language/cwl-v1.2/blob/1.2.1_proposed/json-schema/cwl.yaml),
         donated by Francis Charette-Migneault. This schema captures much, but not

Workflow.yml

@@ -55,8 +55,7 @@ $graph:
       * CWL has been assigned an official IANA Media Type of [`application/cwl`](https://www.iana.org/assignments/media-types/application/cwl)
         for either JSON or YAML format. For JSON formatted CWL documents, [`application/cwl+json`](https://www.iana.org/assignments/media-types/application/cwl+json)
         has also been assigned and can be used. For specifying a YAML formatted
-        CWL document, one can use `application/cwl+yaml` but that is not an official
-        IANA media-type yet.
+        CWL document, one can use [`application/cwl+yaml`](https://www.iana.org/assignments/media-types/application/cwl+yaml).
         The above has been documented in the [Syntax](#Syntax) section.
       * There is now an unofficial [JSON Schema for CWL documents](https://github.com/common-workflow-language/cwl-v1.2/blob/1.2.1_proposed/json-schema/cwl.yaml),
         donated by Francis Charette-Migneault. This schema captures much, but not

concepts.md

@@ -104,7 +104,7 @@ The official IANA media-type for CWL documents is [`application/cwl`](https://ww
 for either JSON or YAML format. For JSON formatted CWL documents,
 [`application/cwl+json`](https://www.iana.org/assignments/media-types/application/cwl+json)
 can be used. For specifying a YAML formatted CWL document, one can use
-`application/cwl+yaml` but that is not an official IANA media-type yet.
+[`application/cwl+yaml`](https://www.iana.org/assignments/media-types/application/cwl+yaml).
 
 CWL documents commonly reference other CWL documents.  Each document
 must declare the `cwlVersion` of that document.  Implementations must