Missing OpCapability Int64Atomics with 64-bit atomics

[spencer-lunarg]

https://godbolt.org/z/9ehdeovxz

groupshared Atomic<uint64_t> atomicVariable;

[shader("compute")]
[numthreads(1, 1, 1)]
void main(uint3 threadId : SV_DispatchThreadID)
{
    uint64_t value = 4ll;
    atomicVariable.store(value);
}

doesn't generate the OpCapability Int64Atomics required and fails spirv-val