Update r.md

Author: nrios14

user/languages/r.md

@@ -8,7 +8,7 @@ layout: en
 
 This guide covers build environment and configuration topics specific to R
 projects.
-Please make sure to read our [Tutorial](/user/tutorial/) and [build configuration](/user/customizing-the-build/) guides first.
+Please make sure to read our [OnBoarding](/user/onboarding/) and [General Build configuration](/user/customizing-the-build/) guides first.
 
 ### Community-Supported Warning