Squashed 'externals/oaknut/' changes from 86f2ca872..c2cb5ec49

c2cb5ec49 github: Faster CI
1ed4284bc code_block: Correct headers

git-subtree-dir: externals/oaknut
git-subtree-split: c2cb5ec49aa4a0748172a6a93df6a0fb17368183

include/oaknut/code_block.hpp

@@ -1,6 +1,9 @@
 // SPDX-FileCopyrightText: Copyright (c) 2022 merryhime <https://mary.rs>
 // SPDX-License-Identifier: MIT
 
+#pragma once
+
+#include <algorithm>
 #include <cstddef>
 #include <cstdint>
 #include <new>