Remove outdated cfg=data"

PiperOrigin-RevId: 202386041
diff --git a/site/docs/skylark/cookbook.md b/site/docs/skylark/cookbook.md
index 2852f55..d382db0 100644
--- a/site/docs/skylark/cookbook.md
+++ b/site/docs/skylark/cookbook.md
@@ -532,7 +532,7 @@
   executable=True,
   attrs={
       "command": attr.string(),
-      "data": attr.label_list(cfg="data", allow_files=True),
+      "data": attr.label_list(allow_files=True),
       },
 )
 ```