Update schedule.rs

Bump code_len until hashmap map issue is sorted out

Author: forgetso

frame/contracts/src/schedule.rs

@@ -483,7 +483,7 @@ impl Default for Limits {
 			subject_len: 32,
 			call_depth: 32,
 			payload_len: 16 * 1024,
-			code_len: 128 * 1024,
+			code_len: 512 * 1024,
 		}
 	}
 }