use setup-flixel v1

Author: Geokureli

.github/workflows/main.yml

@@ -29,7 +29,7 @@ jobs:
         haxelib install haxelib 4.0.3
         haxelib dev flixel-demos .
     
-    - uses: HaxeFlixel/setup-flixel@master
+    - uses: HaxeFlixel/setup-flixel@v1
       with:
         haxe-version: current
         flixel-versions: dev