Fix description of FeatureSIMD
Fix description of FeatureSIMD

The associated dll is actually System.Numerics.Vectors.dll,
plus System.Numerics.dll on desktop.

ruben-ayrapetyan/coreclr,wtgodbe/coreclr,yizhang82/coreclr,cshung/coreclr,JosephTremoulet/coreclr,ruben-ayrapetyan/coreclr,cshung/coreclr,cshung/coreclr,ruben-ayrapetyan/coreclr,JosephTremoulet/coreclr,wtgodbe/coreclr,krk/coreclr,wtgodbe/coreclr,cshung/coreclr,poizan42/coreclr,wtgodbe/coreclr,mmitche/coreclr,mmitche/coreclr,poizan42/coreclr,krk/coreclr,wtgodbe/coreclr,krk/coreclr,poizan42/coreclr,JosephTremoulet/coreclr,krk/coreclr,JosephTremoulet/coreclr,yizhang82/coreclr,mmitche/coreclr,cshung/coreclr,JosephTremoulet/coreclr,poizan42/coreclr,yizhang82/coreclr,krk/coreclr,wtgodbe/coreclr,krk/coreclr,poizan42/coreclr,ruben-ayrapetyan/coreclr,mmitche/coreclr,yizhang82/coreclr,ruben-ayrapetyan/coreclr,poizan42/coreclr,ruben-ayrapetyan/coreclr,mmitche/coreclr,mmitche/coreclr,yizhang82/coreclr,JosephTremoulet/coreclr,cshung/coreclr,yizhang82/coreclr