Fix typo

/rest/i -> REST

Author: changeworld

articles/healthcare-apis/fhir/using-curl.md

@@ -19,15 +19,15 @@ In this article, you'll learn how to access Azure Health Data Services with cURL
 
 * An Azure account with an active subscription. [Create one for free](https://azure.microsoft.com/free/).
 * If you want to run the code locally, install [PowerShell](/powershell/module/powershellget/) and [Azure Az PowerShell](/powershell/azure/install-az-ps).
-* Optionally, you can run the scripts in Visual Studio Code with the Rest Client extension. For more information, see [Make a link to the Rest Client doc](using-rest-client.md).
+* Optionally, you can run the scripts in Visual Studio Code with the REST Client extension. For more information, see [Make a link to the REST Client doc](using-rest-client.md).
 * Download and install [cURL](https://curl.se/download.html).
 
 ### CLI
 
 * An Azure account with an active subscription. [Create one for free](https://azure.microsoft.com/free/).
 * If you want to run the code locally, install [Azure CLI](/cli/azure/install-azure-cli). 
 * Optionally, install a Bash shell, such as Git Bash, which it's included in [Git for Windows](https://gitforwindows.org/).
-* Optionally, run the scripts in Visual Studio Code with the Rest Client extension. For more information, see [Make a link to the Rest Client doc](using-rest-client.md).
+* Optionally, run the scripts in Visual Studio Code with the REST Client extension. For more information, see [Make a link to the REST Client doc](using-rest-client.md).
 * Download and install [cURL](https://curl.se/download.html).
 
 ## Obtain Azure Access Token