add MarkO (firstcontributions#67605)

Author: xitxat

Contributors.md

@@ -1294,6 +1294,7 @@ chani-israel
 - [Chao Neil Aryan Borgohain](https://github.com/ChaoNEil)
 - [shashi kiran](https://github.com/Sagar180304)
 - [Doran05](https://github.com/martinkuba333)
+- [Mark O](https://github.com/xitxat)
 - [Justin Settle](https://github.com/justin-settle)
 - [Yuri Petrillo](https://github.com/yuripetrillo)
 - [Shreyash Kakde](https://github.com/Shreyashkakde1/)

gui-tool-tutorials/github-windows-vs-code-tutorial.md

@@ -66,7 +66,7 @@ Open up the command palette again by pressing `F1`. Type in `branch` and select
 
 Open `Contributors.md` and add your name anywhere in the file. This file contains GFM (GitHub Flavored Markdown) which is a proprietary flavor of the <a href="https://en.wikipedia.org/wiki/Markdown">markdown</a> syntax.
 
-Copy one of the other contributors&apos; lines and modify it with your name to make sure you get the syntax right - it can be picky.
+Copy one of the other contributors&apos; lines and modify it with your name to make sure you get the syntax right - it can be picky. Save file to register change.
 
 <img src="https://firstcontributions.github.io/assets/gui-tool-tutorials/github-windows-vs-code-tutorial/vscode-2018-08-changes.png" alt="Add your name" />