fix test

doc/src/ch02-lang/ch04-macros/ch01-builtins.md

@@ -168,7 +168,7 @@ push 0x08
 # let mut output = Vec::new();
 # let mut ingest = etk_asm::ingest::Ingest::new(&mut output, etk_ops::HardFork::Cancun);
 # ingest.ingest(file!(), src).unwrap();
-# assert_eq!(output, &[0x60, 0x02, 0x5b]);
+# assert_eq!(output, &[0x60, 0x08]);
 ```
 
 can only be compiled by specifying a hardfork using the `--hardfork` flag (the latest hardfork available by default) strictly after `London` and equal or older than `Cancun`.