Corrected the docs description of alignment requirement for Lazy<T>

[csmyx]

Why

According to this static assert, the alignment requirement for type 'T' in 'Lazy' should not exceed 'alignof(std::max_align_t)'.

#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wgnu-alignof-expression"
    static_assert(alignof(T) <= alignof(std::max_align_t),
                  "async_simple doesn't allow Lazy with over aligned object");
#endif

What is changing

Corrected the description of the alignment requirement for type 'T' in 'Lazy' that it can not exceed 'alignof(std::max_align_t)'.