Update about.es.js

Author: diegooviedo3004

src/pages/about.es.js

@@ -2,7 +2,7 @@ import React from 'react';
 import AboutPage from '../components/AboutPage';
 
 const About = () => {
-  return <AboutPage lang="es" title="About the course | Full Stack open" />;
+  return <AboutPage lang="es" title="Sobre el curso | Full Stack open" />;
 };
 
 export default About;