Fix iree:span construction error using C++20 (#15489)

runtime/src/iree/modules/check/module.cc

diff --git a/runtime/src/iree/modules/check/module.cc b/runtime/src/iree/modules/check/module.cc
index edbb9fe..41ab445 100644
--- a/runtime/src/iree/modules/check/module.cc
+++ b/runtime/src/iree/modules/check/module.cc
@@ -231,8 +231,11 @@
 static Status TransferToHost(iree_hal_device_t* device,
                              vm::ref<iree_hal_buffer_view_t>& buffer_view) {
   IREE_TRACE_SCOPE();
-  IREE_ASSIGN_OR_RETURN(auto target_views,
-                        TransferBuffersToHost(device, {buffer_view}));
+  IREE_ASSIGN_OR_RETURN(
+      auto target_views,
+      TransferBuffersToHost(
+          device,
+          iree::span<const vm::ref<iree_hal_buffer_view_t>>({buffer_view})));
   buffer_view = std::move(target_views[0]);
   return OkStatus();
 }
@@ -243,7 +246,9 @@
   IREE_TRACE_SCOPE();
   IREE_ASSIGN_OR_RETURN(
       auto target_views,
-      TransferBuffersToHost(device, {buffer_view_a, buffer_view_b}));
+      TransferBuffersToHost(device,
+                            iree::span<const vm::ref<iree_hal_buffer_view_t>>(
+                                {buffer_view_a, buffer_view_b})));
   buffer_view_a = std::move(target_views[0]);
   buffer_view_b = std::move(target_views[1]);
   return OkStatus();