Git-Action: Update Readme

Author: thelightway24

README.md

@@ -115,6 +115,7 @@
 | 5430 | [5430. AC](./%EB%B0%B1%EC%A4%80/Gold/5430.%E2%80%85AC) |
 | 6198 | [6198. 옥상 정원 꾸미기](./%EB%B0%B1%EC%A4%80/Gold/6198.%E2%80%85%EC%98%A5%EC%83%81%E2%80%85%EC%A0%95%EC%9B%90%E2%80%85%EA%BE%B8%EB%AF%B8%EA%B8%B0) |
 | 9466 | [9466. 텀 프로젝트](./%EB%B0%B1%EC%A4%80/Gold/9466.%E2%80%85%ED%85%80%E2%80%85%ED%94%84%EB%A1%9C%EC%A0%9D%ED%8A%B8) |
+| 11559 | [11559. Puyo Puyo](./%EB%B0%B1%EC%A4%80/Gold/11559.%E2%80%85Puyo%E2%80%85Puyo) |
 | 17298 | [17298. 오큰수](./%EB%B0%B1%EC%A4%80/Gold/17298.%E2%80%85%EC%98%A4%ED%81%B0%EC%88%98) |
 </details>