Update kernel.cpp (#2125)

In kernel.cpp boost io_context.reset() deprecated/discontinued in latest versions.  Changed to io_context.restart() as recommended.

src/core/libraries/kernel/kernel.cpp

@@ -60,7 +60,7 @@ static void KernelServiceThread(std::stop_token stoken) {
         }
 
         io_context.run();
-        io_context.reset();
+        io_context.restart();
 
         asio_requests = 0;
     }