[social/following] Don't make uri required (not supported by Discord) (…

…#22)

social/following/v0.1.0/schema.json

@@ -52,7 +52,7 @@
                     "type": "object"
                 }
             },
-            "required": ["name", "uri"]
+            "required": ["name"]
         }
     ]
   }