doc: fixed typo

src/entt/core/type_traits.hpp

@@ -586,7 +586,7 @@ inline constexpr auto is_empty_v = is_empty<Type>::value;
  */
 template<typename To, typename From>
 struct constness_as {
-    /*! @brief The type resulting from the transcription of the constness */
+    /*! @brief The type resulting from the transcription of the constness. */
     using type = std::remove_const_t<To>;
 };
 
@@ -594,7 +594,7 @@ struct constness_as {
 /*! @copydoc constness_as */
 template<typename To, typename From>
 struct constness_as<To, const From> {
-    /*! @brief The type resulting from the transcription of the constness */
+    /*! @brief The type resulting from the transcription of the constness. */
     using type = std::add_const_t<To>;
 };