add icon to notification in notify function

screenshot.go

@@ -31,7 +31,7 @@ func notify(body, title string) {
 	if title == "" {
 		title = scriptName
 	}
-	cmd := exec.Command("notify-send", "-a", "Screenshot", title, body)
+	cmd := exec.Command("notify-send", "-a", "Screenshot", "-i", "camera", title, body)
 	if err := cmd.Run(); err != nil {
 		fmt.Fprintf(os.Stderr, "notify error: %v\n", err)
 	}