Update doc/modules/ROOT/pages/ref_headers.adoc

Co-authored-by: Copilot <[email protected]>

Author: jll63

doc/modules/ROOT/pages/ref_headers.adoc

@@ -56,13 +56,13 @@ functions.
 [#std_shared_ptr]
 ### link:{{BASE_URL}}/include/boost/openmethod/interop/std_shared_ptr.hpp[<boost/openmethod/interop/std_shared_ptr.hpp>]
 
-Provides a `virtual_traits` specialization that make it possible to use a
+Provides a `virtual_traits` specialization that makes it possible to use a
 `std::shared_ptr` in place of a raw pointer or reference in virtual parameters.
 
 [#std_unique_ptr]
 ### link:{{BASE_URL}}/include/boost/openmethod/interop/std_unique_ptr.hpp[<boost/openmethod/interop/std_unique_ptr.hpp>]
 
-Provides a `virtual_traits` specialization that make it possible to use a
+Provides a `virtual_traits` specialization that makes it possible to use a
 `std::unique_ptr` in place of a raw pointer or reference in virtual parameters.
 
 *The headers below are for advanced use*.