try to fix import files not being generated

.github/workflows/gdextension.yml

@@ -296,7 +296,9 @@ jobs:
       - name: Generate icon .import files
         shell: bash
         run: |
+          touch out/project.godot
           timeout 20s ./bin/godot --headless --editor --path ./out/ || /bin/true
+          rm out/project.godot
 
       - name: Change editor scale import settings
         shell: bash