[mdspan.submdspan.submdspan] Rename section to "submdspan template function"

Author: burblebee

source/containers.tex

@@ -19006,7 +19006,7 @@
   template<class IndexType, class... Extents, class... SliceSpecifiers>
     constexpr auto submdspan_extents(const extents<IndexType, Extents...>&, SliceSpecifiers...);
 
-  // \ref{mdspan.submdspan.submdspan}, \tcode{submdspan} function
+  // \ref{mdspan.submdspan.submdspan}, \tcode{submdspan} template function
   template<class ElementType, class Extents, class LayoutPolicy,
            class AccessorPolicy, class... SliceSpecifiers>
     constexpr auto submdspan(
@@ -21969,7 +21969,7 @@
 \end{itemize}
 \end{itemdescr}
 
-\rSec4[mdspan.submdspan.submdspan]{\tcode{submdspan} function}
+\rSec4[mdspan.submdspan.submdspan]{\tcode{submdspan} template function}
 
 \indexlibraryglobal{submdspan}%
 \begin{itemdecl}