Updated Runtime Environments (markdown)

Runtime-Environments.md

@@ -15,10 +15,10 @@ This page contains notes about using various runtime environments in ReCodEx as
 * Prolog (SWI)
 * [Python 3](#python)
 * Rust
-* [Scala](#scala) - COMING SOON!
-* [Groovy](#groovy) - COMING SOON!
-* [Kotlin](#kotlin) - COMING SOON!
-* Shell - COMING SOON!
+* [Scala](#scala)
+* [Groovy](#groovy)
+* [Kotlin](#kotlin)
+* Shell
 
 Exercises may be configured for multiple environments, so the student may choose the language for the solution. However, Data-only, Haskell, and Prolog have somewhat unique configurations, therefore an exercise must use such environment exclusively.