Update 2020.json

Author: mjmolina

data/sponsors/EuroPython/2020.json

@@ -37,7 +37,7 @@
         },
         {
             "name": "Trayport",
-            "website": "https://numberly.com/",
+            "website": "https://trayport.com/",
             "level": "Unknown"
         },
         {
@@ -61,4 +61,4 @@
             "level": "Unknown"
         }
     ]
-}
+}