slight restructuring

remove Authentication sub headings and change them to paragraph

Author: TC-MO

sources/platform/integrations/integrate_with_apify.md

@@ -60,14 +60,10 @@ Alternatively, you can let your users manage the connection directly on your sid
 
 Apify supports two main authentication methods for secure API access.
 
-#### OAuth 2.0
-
-Use OAuth 2.0 to allow users to authorize your integration without sharing their credentials.
+_OAuth 2.0_ - Use OAuth 2.0 to allow users to authorize your integration without sharing their credentials.
 <!-- TODO expand section possibly? -->
 
-#### API Token
-
-Apify user generates personal API token from Apify account settings page. For more information, see [API Token documentation](https://docs.apify.com/platform/integrations/api#api-token).
+_API token_ - Apify user generates personal API token from Apify account settings page. For more information, see [API Token documentation](https://docs.apify.com/platform/integrations/api#api-token).
 
 ### API implementation