Update Kotlin support information in documentation

Clarify Kotlin's support status in FIRST Tech Challenge.

Author: zachwaffle4

docs/source/programming_resources/shared/installing_kotlin/Installing-Kotlin.rst

@@ -43,9 +43,7 @@ Using Kotlin in *FIRST* Tech Challenge
 
 
 While there is no rule (as of the writing of this document) prohibiting Kotlin as a programming 
-option in *FIRST* Tech Challenge, it is not one of the recommended tools as listed in **<RS02>** 
-"Recommended Programming Tools" portion of the *FIRST* Tech Challenge 
-:doc:`Competition Manual <../../../manuals/game_manuals/game_manuals>`.
+option in *FIRST* Tech Challenge, it is not an officially supported or recommended language.
 Teams that use Kotlin do so at their own risk and should expect that there will not be technical
 help/support available at events in the case of software issues.