Cleanup: remove f-string use

release/scripts/startup/nodeitems_builtins.py

@@ -478,7 +478,7 @@ texture_node_categories = [
 def not_implemented_node(idname):
     NodeType = getattr(bpy.types, idname)
     name = NodeType.bl_rna.name
-    label = f"{name} (mockup)"
+    label = "%s (mockup)" % name
     return NodeItem(idname, label=label)
 
 simulation_node_categories = [