Update emoji set to Unicode 15 (#25595)

Update emoji set to Unicode 15 which was added upstream here:
cb5c514d47

<img width="854" alt="Screenshot 2023-06-29 at 11 02 56 AM"
src="https://github.com/go-gitea/gitea/assets/1669571/7bfb663d-0804-4d23-a62d-f585a6783ca6">

---------

Co-authored-by: silverwind <me@silverwind.io>

web_src/js/utils/match.test.js

@@ -39,6 +39,10 @@ test('matchEmoji', () => {
   expect(matchEmoji('1st_')).toEqual([
     '1st_place_medal',
   ]);
+
+  expect(matchEmoji('jellyfis')).toEqual([
+    'jellyfish',
+  ]);
 });
 
 test('matchMention', () => {