fixing custom note markdown

Author: v-dirichards

articles/sentinel/data-connectors/proofpoint-on-demand-email-security.md

@@ -102,7 +102,8 @@ Use the following step-by-step instructions to deploy the Proofpoint On Demand E
 
 **1. Deploy a Function App**
 
-> NOTE:You will need to [prepare VS Code](/azure/azure-functions/functions-create-first-function-python#prerequisites) for Azure function development.
+> [!NOTE]
+>You will need to [prepare VS Code](/azure/azure-functions/functions-create-first-function-python#prerequisites) for Azure function development.
 
 1. Download the [Azure Function App](https://aka.ms/sentinel-proofpointpod-functionapp) file. Extract archive to your local development computer.
 2. Start VS Code. Choose File in the main menu and select Open Folder.