fix: Restore article tags property to article_list_item schema for v2.14+

The tags property was present in v2.13 but accidentally omitted from the
article_list_item schema in v2.14, v2.15, and Unstable specs. The API
continues to return tags in these versions, so this restores the schema
to match runtime behavior.

Fixes #469453

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: markdennis22

descriptions/0/api.intercom.io.yaml

@@ -16319,6 +16319,8 @@ components:
         translated_content:
           nullable: true
           "$ref": "#/components/schemas/article_translated_content"
+        tags:
+          "$ref": "#/components/schemas/tags"
     internal_article_list_item:
       title: Internal Articles
       type: object

descriptions/2.14/api.intercom.io.yaml

@@ -15053,6 +15053,8 @@ components:
         translated_content:
           nullable: true
           "$ref": "#/components/schemas/article_translated_content"
+        tags:
+          "$ref": "#/components/schemas/tags"
     internal_article_list_item:
       title: Internal Articles
       type: object

descriptions/2.15/api.intercom.io.yaml

@@ -15625,6 +15625,8 @@ components:
         translated_content:
           nullable: true
           "$ref": "#/components/schemas/article_translated_content"
+        tags:
+          "$ref": "#/components/schemas/tags"
     internal_article_list_item:
       title: Internal Articles
       type: object