chore: update language in index.html to Chinese

web/index.html

@@ -1,5 +1,5 @@
 <!doctype html>
-<html lang="en">
+<html lang="zh">
   <head>
     <meta charset="utf-8" />
     <link rel="icon" href="/logo.png" />

web/src/components/HeaderBar.js

@@ -199,7 +199,7 @@ const HeaderBar = () => {
                       </Dropdown.Menu>
                     }
                   >
-                    <Nav.Item itemKey={'new-year'} text={'🏮'} />
+                    <Nav.Item itemKey={'new-year'} text={'🎉'} />
                   </Dropdown>
                 )}
                 {/* <Nav.Item itemKey={'about'} icon={<IconHelpCircle />} /> */}