Adding regions tag

Author: v-regandowner

articles/cognitive-services/language-service/summarization/region-support.md

@@ -8,6 +8,7 @@ manager: nitinme
 ms.service: cognitive-services
 ms.subservice: language-service
 ms.topic: conceptual
+ms.custom: references_regions
 ms.date: 06/11/2023
 ms.author: jboback
 ---
@@ -27,4 +28,4 @@ Use this article to learn which regions are supported by all summarization featu
 
 ## Next steps
 
-* [Summarization overview](overview.md)
+* [Summarization overview](overview.md)