tweak test case description

src/components/SiderMenu/SilderMenu.test.js

@@ -18,7 +18,7 @@ const menu = [{
 
 const flatMenuKeys = getFlatMenuKeys(menu);
 
-describe('test convert tree structure menu paths to flat menu paths', () => {
+describe('test convert nested menu to flat menu', () => {
   it('simple menu', () => {
     expect(flatMenuKeys).toEqual(
       ['/dashboard', '/dashboard/name', '/userinfo', '/userinfo/:id', '/userinfo/:id/info']