docs: add Cyber Apocalypse to list

Author: UrSourceCode

README.md

@@ -8,4 +8,4 @@ This repository contains a collection of CTF write-ups that I have participated
 | Nullcon HackIM CTF 2023                   | 09 March, 18:00 WIB — 10 March 2023, 18:00 WIB | [Link](https://github.com/elshiraphine/ctf-writeup/tree/main/2023-Nullcon%20HackIM%20CTF) |
 | SpringForward CTF 2023                    | 11 March, 08:00 WIB — 12 March 2023, 20:00 WIB | [Link](https://github.com/elshiraphine/ctf-writeup/tree/main/2023-SpringForward%20CTF) |
 | Wolv CTF 2023                             | 18 March, 03:00 WIB — 20 March 2023, 03:00 WIB | [Link](https://github.com/elshiraphine/ctf-writeup/tree/main/2023-Wolv%20CTF)          |
-| Cyber Apocalypse 2023: The Cursed Mission | 18 March, 20:00 WIB — 23 March 2023, 19:59 WIB | Ongoing              |
+| Cyber Apocalypse 2023: The Cursed Mission | 18 March, 20:00 WIB — 23 March 2023, 19:59 WIB | [Link](https://github.com/elshiraphine/ctf-writeup/tree/main/2023-Cyber%20Apocalypse)        |