Add missing include.

tinic · tinic · commit ee375c4f9fab · 2025-07-23T12:51:45.000-07:00
diff --git a/README.md b/README.md
@@ -148,6 +148,7 @@ Compile as such (clang needs -fconstexpr-steps=33554432):
 ```c++
 #include "constixel.hpp"
 
+#include <iostream>
 #include <cstring>
 
 consteval auto gen_sixel() {
