Reword the README a bit

Former-commit-id: c836aff8c913d49dc6d112fd4e3f1de7fe5261e8

README.md

@@ -3,10 +3,10 @@ ATLAS Offline software
 
 Welcome to [ATLAS](https://atlas.ch) offline software.  
 
-Please see the [Twiki](https://twiki.cern.ch/twiki/bin/view/AtlasComputing/AtlasComputing) for more information, or look below for some other links.
-
 If you fork this project, please don't forget to add the ATLAS Robot as a developer (assuming you might want to submit a merge request) as documented [here](https://atlassoftwaredocs.web.cern.ch/gittutorial/gitlab-fork/).
 
+Please see the [Twiki](https://twiki.cern.ch/twiki/bin/view/AtlasComputing/AtlasComputing) for more information, or look below for some other links.
+
 Links
 ------------------------