Fix Vector.As documentation (#8340)

Author: MichalPetryka

xml/System.Numerics/Vector.xml

@@ -238,9 +238,9 @@
         <typeparam name="TFrom">The type of the input vector.</typeparam>
         <typeparam name="TTo">The type of the vector <paramref name="vector" /> should be reinterpreted as.</typeparam>
         <param name="vector">The vector to reinterpret.</param>
-        <summary>Reinterprets a <see cref="T:System.Runtime.Intrinsics.Vector64`1" /> as a new <see cref="T:System.Runtime.Intrinsics.Vector64`1" />.</summary>
+        <summary>Reinterprets a <see cref="T:System.Numerics.Vector`1" /> as a new <see cref="T:System.Numerics.Vector`1" />.</summary>
         <returns>
-          <paramref name="vector" /> reinterpreted as a new <see cref="T:System.Runtime.Intrinsics.Vector64`1" />.</returns>
+          <paramref name="vector" /> reinterpreted as a new <see cref="T:System.Numerics.Vector`1" />.</returns>
         <remarks>To be added.</remarks>
         <exception cref="T:System.NotSupportedException">The type of <paramref name="vector" /> (<typeparamref name="TFrom" />) or the type of the target (<typeparamref name="TTo" />) is not supported.</exception>
       </Docs>