Move documentation link above settings gear in sidebar (#7432)

Co-authored-by: openhands <openhands@all-hands.dev>

frontend/src/components/features/sidebar/sidebar.tsx

@@ -105,10 +105,10 @@ export function Sidebar() {
                 )}
               />
             </TooltipButton>
-            <DocsButton />
           </div>
 
           <div className="flex flex-row md:flex-col md:items-center gap-[26px] md:mb-4">
+            <DocsButton />
             <NavLink
               to="/settings"
               className={({ isActive }) =>