Fixed typo in usage message (#680)

Author: csarnataro

cmd/arduino-app-cli/daemon/daemon.go

@@ -23,7 +23,7 @@ import (
 func NewDaemonCmd(cfg config.Configuration, version string) *cobra.Command {
 	daemonCmd := &cobra.Command{
 		Use:   "daemon",
-		Short: "Run an HTTP server to expose arduino-app-cli functionality thorough REST API",
+		Short: "Run an HTTP server to expose arduino-app-cli functionality through REST API",
 		Run: func(cmd *cobra.Command, args []string) {
 			daemonPort, _ := cmd.Flags().GetString("port")