Fix React DOM warning (#2615)

Author: gregberge

packages/gitbook/src/components/Header/HeaderLink.tsx

@@ -104,7 +104,7 @@ function HeaderItemButton(
         linkStyle: 'button-secondary' | 'button-primary';
     },
 ) {
-    const { linkStyle, headerPreset, title, href, ...rest } = props;
+    const { linkStyle, headerPreset, title, href, isDropdown, ...rest } = props;
     const variant = (() => {
         switch (linkStyle) {
             case 'button-secondary':

packages/gitbook/src/lib/emojis.test.ts

@@ -9,6 +9,8 @@ describe('getEmojiForCode', () => {
 
     it('should handle complex codes', () => {
         expect(getEmojiForCode('1f935-2642')).toEqual('🤵‍♂️');
+        expect(getEmojiForCode('1f3c3-2642')).toEqual('🏃‍♂️');
+        expect(getEmojiForCode('1f468-2696')).toEqual('👨‍⚖️');
     });
 
     it('should return an empty string if invalid', () => {