Updated Jump App version to v2.3

src/ui/header/Header.tsx

@@ -14,7 +14,7 @@ export const Header: React.FunctionComponent<Props> = () => {
         <a href='/'>
           <Logo size='xxl'></Logo>
         </a>
-        <h1>Jump App v2.2 DEV</h1>
+        <h1>Jump App v2.3 DEV</h1>
       </div>
     </>
   );