Fix docs of method MemoryExtensions.AsSpan<T>(this T[]? array, int start, int length) (#9444)

Author: halgab

xml/System/MemoryExtensions.xml

@@ -1556,7 +1556,7 @@ Returns `default` when `array` is `null`.
         <exception cref="T:System.ArrayTypeMismatchException">
           <paramref name="array" /> is covariant, and the array's type is not exactly <see langword="T[]" />".</exception>
         <exception cref="T:System.ArgumentOutOfRangeException">
-          <paramref name="start" />, <paramref name="length" />, or <paramref name="start" /> + <paramref name="length" /> is not in the range of <paramref name="text" />.</exception>
+          <paramref name="start" />, <paramref name="length" />, or <paramref name="start" /> + <paramref name="length" /> is not in the range of <paramref name="array" />.</exception>
       </Docs>
     </Member>
     <Member MemberName="BinarySearch&lt;T&gt;">