Update coroutines.md

Author: CedNaru

docs/src/doc/user-guide/coroutines.md

@@ -7,7 +7,7 @@ To use it, you need to add the following to your build.gradle:
 
 ```kotlin
 godot {
-    enableGodotCoroutines.set(true)
+    isGodotCoroutinesEnabled.set(true)
 }
 ```
 
@@ -21,4 +21,4 @@ fun myMethod() = godotCoroutine {
     mySignal.await() // the current coroutine will suspend until that signal is emitted.
     doSomething2()
 }
-```
+```