auto update README.md

Author: CheChe903

README.md

@@ -114,6 +114,7 @@
 |5557. 1학년|[링크](./%EB%B0%B1%EC%A4%80/Gold/5557.%E2%80%851%ED%95%99%EB%85%84/README.md)|
 |7569. 토마토|[링크](./%EB%B0%B1%EC%A4%80/Gold/7569.%E2%80%85%ED%86%A0%EB%A7%88%ED%86%A0/README.md)|
 |7576. 토마토|[링크](./%EB%B0%B1%EC%A4%80/Gold/7576.%E2%80%85%ED%86%A0%EB%A7%88%ED%86%A0/README.md)|
+|9084. 동전|[링크](./%EB%B0%B1%EC%A4%80/Gold/9084.%E2%80%85%EB%8F%99%EC%A0%84/%EB%8F%99%EC%A0%84.java)|
 |9205. 맥주 마시면서 걸어가기|[링크](./%EB%B0%B1%EC%A4%80/Gold/9205.%E2%80%85%EB%A7%A5%EC%A3%BC%E2%80%85%EB%A7%88%EC%8B%9C%EB%A9%B4%EC%84%9C%E2%80%85%EA%B1%B8%EC%96%B4%EA%B0%80%EA%B8%B0/README.md)|
 |9251. LCS|[링크](./%EB%B0%B1%EC%A4%80/Gold/9251.%E2%80%85LCS/README.md)|
 |9252. LCS 2|[링크](./%EB%B0%B1%EC%A4%80/Gold/9252.%E2%80%85LCS%E2%80%852/LCS%E2%80%852.java)|