Use short name for reference link name

As the parent block is a namespace declaration, we can use nesting to imply the
namespace. This removes the namespace from the object name and matches what we
do on other pages.

autoapi/templates/dotnet/base_list.rst

@@ -48,7 +48,7 @@
 {%- for obj_item in obj.item_map.get(item_type, []) %}
 {% macro render() %}{{ obj_item.summary }}{% endmacro %}
 
-    {{ obj_item.type }} :dn:{{ obj_item.ref_directive }}:`{{ obj_item.ref_name }}`
+    {{ obj_item.type }} :dn:{{ obj_item.ref_directive }}:`{{ obj_item.ref_short_name }}`
         .. object: type={{ obj_item.type }} name={{ obj_item.ref_name }}
 
         {{ render()|indent(8) }}