Fix build

Summary: related to T15996

Reviewers: iljazovic

Reviewed By: iljazovic

Subscribers: miljen

Differential Revision: https://repo.mireo.local/D33388

example/hello_world_over_tls.cpp

@@ -87,7 +87,7 @@ int main(int argc, char** argv) {
         .credentials(cfg.client_id) // Set the Client Identifier. (optional)
         .async_run(boost::asio::detached); // Start the Client.
 
-    client.async_publish<boost/mqtt5::qos_e::at_most_once>(
+    client.async_publish<boost::mqtt5::qos_e::at_most_once>(
         "async-mqtt5/test", "Hello world!",
         boost::mqtt5::retain_e::no, boost::mqtt5::publish_props{},
         [&client](boost::mqtt5::error_code ec) {

include/boost/mqtt5/impl/autoconnect_stream.hpp

@@ -25,7 +25,7 @@
 #include <cstdint>
 #include <memory>
 #include <string>
-#include <utility>
+#include <variant> // std::monostate
 
 namespace boost::mqtt5::detail {
 

include/boost/mqtt5/impl/client_service.hpp

@@ -26,7 +26,7 @@
 #include <memory>
 #include <string>
 #include <type_traits>
-#include <utility>
+#include <variant> // std::monostate
 
 namespace boost::mqtt5::detail {
 

include/boost/mqtt5/types.hpp

@@ -142,7 +142,7 @@ enum class retain_handling_e : std::uint8_t {
  * \brief Represents the \__SUBSCRIBE_OPTIONS\__ associated with each Subscription.
  */
 struct subscribe_options {
-    /** \brief Maximum \__QOS\__ level at which the Server can send Application Messages to the Client.
+    /** \brief Maximum \__QOS\__ level at which the Server can send Application Messages to the Client. */
     qos_e max_qos = qos_e::exactly_once;
 
     /** \brief Option determining if Application Messages will be