(AzureCXP) fixes MicrosoftDocs/azure-docs#327333

Updated line number 27.

From: Get started with entity linking
To: Get started with Key phrase extraction

Author: pratikjadhav13

articles/ai-services/language-service/key-phrase-extraction/overview.md

@@ -24,7 +24,7 @@ This documentation contains the following types of articles:
 [!INCLUDE [Typical workflow for pre-configured language features](../includes/overview-typical-workflow.md)]
 
 
-## Get started with entity linking
+## Get started with Key phrase extraction
 
 [!INCLUDE [development options](./includes/development-options.md)]