feat: add missing include that fixes support for gcc13 builds

[Bruno-DaSilva]

reason: https://gcc.gnu.org/gcc-13/porting_to.html#:~:text=The%20following%20headers%20are%20used%20less%20widely%20in%20libstdc%2B%2B%20and%20may%20need%20to%20be%20included%20explicitly%20when%20compiling%20with%20GCC%2013%3A

[rlcevg]

if #include <cstdint> is the only thing and i didn't miss anything else then it's already in https://github.com/rlcevg/CircuitAI/blob/zk/src/circuit/util/MaskHandler.h#L11

[Bruno-DaSilva]

@rlcevg ah perfect, BAR105 spring is just out of date on those last two commits. Thanks!