Fix create app command

appbase/app/app_create.go

@@ -25,7 +25,7 @@ func RunAppCreate(appName string, esVersion string, category string) error {
 	spinner.Start()
 	defer spinner.Stop()
 	// create app
-	body := fmt.Sprintf(`{"category": %s, "es_version": %s}`, category, esVersion)
+	body := fmt.Sprintf(`{"category": "%s", "es_version": "%s"}`, category, esVersion)
 	req, err := http.NewRequest("PUT", common.AccAPIURL+"/app/"+appName, strings.NewReader(body))
 	if err != nil {
 		return err