chore: aligned docs to the template file for articles

knowledge base/postman.md

@@ -2,6 +2,8 @@
 
 API platform for building and using APIs.
 
+## Table of contents <!-- omit in toc -->
+
 1. [Further readings](#further-readings)
 
 ## Further readings
@@ -11,10 +13,14 @@ API platform for building and using APIs.
 - [Insomnia], an alternative to Postman
 - [Newman], CLI Collection runner for Postman
 
-<!-- internal knowledge base -->
+<!--
+  References
+  -->
+
+<!-- Knowledge base -->
 [insomnia]: insomnia.md
 [newman]: newman.md
 
-<!-- projects' references -->
+<!-- Upstream -->
 [documentation]: https://learning.postman.com/docs
 [website]: https://www.postman.com/