Fix typo

newIDE/app/src/EventsFunctionsExtensionEditor/ExtensionFunctionSelectorDialog.js

@@ -168,7 +168,7 @@ export default function BehaviorMethodSelectorDialog({
               }
               description={
                 <Trans>
-                  Events that will be run once when the a scene of the game is
+                  Events that will be run once when a scene of the game is
                   loaded, before the scene events.
                 </Trans>
               }