fix README

Author: mohsinulhaq

README.md

@@ -52,15 +52,15 @@ render(
     )}
   >
     {({ getTriggerProps, triggerRef }) => (
-      <div
+      <span
         {...getTriggerProps({
           ref: triggerRef,
           className: 'trigger'
           /* your props here */
         })}
       >
         Click Me!
-      </div>
+      </span>
     )}
   </TooltipTrigger>,
   document.getElementById('root')