Added out to EGL's built-in variables in the playground

Signed-off-by: Dimitris Kolovos <[email protected]>

Author: kolovos

mkdocs/docs/playground/dist/bundle.js

@@ -327,7 +327,7 @@ class MonacoSetup {
                     ],
 
                     constants: [
-                        'true', 'false', 'self', 'loopCount', 'hasMore'
+                        'true', 'false', 'self', 'loopCount', 'hasMore', 'out'
                     ],
 
                     types: [