Minor update to the README.md to better organize the resources about PSReadLine (#3152)

Author: daxian-dbw

README.md

@@ -30,11 +30,11 @@ It provides:
 
 The "out of box" experience is meant to be very familiar to PowerShell users - there should be no need to learn any new key strokes.
 
-Keith Hill wrote a [great introduction](https://rkeithhill.wordpress.com/2013/10/18/psreadline-a-better-line-editing-experience-for-the-powershell-console/) (2013) to `PSReadLine`.
+Some good resources about `PSReadLine`:
 
-Ed Wilson (Scripting Guy) wrote a [series](https://devblogs.microsoft.com/scripting/tag/psreadline/) (2014-2015) on `PSReadLine`.
-
-John Savill has a [video](https://www.youtube.com/watch?v=Q11sSltuTE0) (2021) covering installation, configuration, and tailoring `PSReadLine` to your liking.
+- Keith Hill wrote a [great introduction](https://rkeithhill.wordpress.com/2013/10/18/psreadline-a-better-line-editing-experience-for-the-powershell-console/) (2013) to `PSReadLine`.
+- Ed Wilson (Scripting Guy) wrote a [series](https://devblogs.microsoft.com/scripting/tag/psreadline/) (2014-2015) on `PSReadLine`.
+- John Savill has a [video](https://www.youtube.com/watch?v=Q11sSltuTE0) (2021) covering installation, configuration, and tailoring `PSReadLine` to your liking.
 
 ## Installation