Boost library typo fix

Author: John-Dean

libraries/boost_1_69_0/boost/locale/localization_backend.hpp

@@ -37,8 +37,8 @@ namespace boost {
         /// -# \c message_path - path to the location of message catalogs (vector of strings)
         /// -# \c message_application - the name of applications that use message catalogs (vector of strings)
         /// 
-        /// Each backend can be installed with a different default priotiry so when you work with two different backends, you
-        /// can specify priotiry so this backend will be chosen according to their priority.
+        /// Each backend can be installed with a different default priority so when you work with two different backends, you
+        /// can specify priority so this backend will be chosen according to their priority.
         ///
 
         class localization_backend {