Loft uses kw arguments (#4757)

Part of #4600

src/wasm-lib/derive-docs/tests/args_with_lifetime.gen

@@ -91,6 +91,7 @@ impl crate::docs::StdLibFn for SomeFn {
             schema: generator.root_schema_for::<Foo>(),
             required: true,
             label_required: true,
+            description: String::new().to_string(),
         }]
     }
 
@@ -105,6 +106,7 @@ impl crate::docs::StdLibFn for SomeFn {
             schema,
             required: true,
             label_required: true,
+            description: String::new(),
         })
     }