replaced header image and modified strings

src/views/conference/2020/index/index.jsx

@@ -75,7 +75,7 @@ const ConferenceSplash = () => (
                 </table>
                 <a
                     className="button mod-2020-panel"
-                    href="http://scratch2020.eventbrite.com/"
+                    href="http://scratch2021.eventbrite.com/"
                 >
                     <FormattedMessage id="conference-2020.register" />
                 </a>

src/views/conference/2020/index/l10n.json

 {
     "conference-2020.title": "Scratch Around the World:",
     "conference-2020.subtitle": "An Online Conference",
-    "conference-2020.dateDesc": "July 22",
+    "conference-2020.dateDesc": "July 22, 2021",
     "conference-2020.locationDetails": "Online",
 
     "conference-2020.date": "When:",