Fix make_device_vector_view (#595)

Small typo fix.

Authors:
  - Micka (https://github.com/lowener)

Approvers:
  - Corey J. Nolet (https://github.com/cjnolet)
  - Jiaming Yuan (https://github.com/trivialfis)

URL: #595

cpp/include/raft/mdarray.hpp

@@ -482,7 +482,7 @@ template <typename ElementType>
 auto make_host_vector_view(ElementType* ptr, size_t n)
 {
   detail::vector_extent extents{n};
-  return host_matrix_view<ElementType>{ptr, extents};
+  return host_vector_view<ElementType>{ptr, extents};
 }
 
 /**
@@ -496,7 +496,7 @@ template <typename ElementType>
 auto make_device_vector_view(ElementType* ptr, size_t n)
 {
   detail::vector_extent extents{n};
-  return device_matrix_view<ElementType>{ptr, extents};
+  return device_vector_view<ElementType>{ptr, extents};
 }
 
 /**