Update 3.0.md

updated tag object ot use the x-id

Author: micheldumontier

versions/3.0.md

@@ -2295,8 +2295,8 @@ This object can be extended with [Specification Extensions](#specificationExtens
 ```
 ##### Tag Object smartAPI Examples
 ```yaml
-- name: http://purl.bioontology.org/ontology/MESH/D057805
-  description: Pets
+- id: http://purl.bioontology.org/ontology/MESH/D057805
+  name: Pets
 ```
 
 #### <a name="examplesObject"></a>Examples Object