auto update README.md

README.md

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 |2448. 별 찍기 － 11|[링크](./%EB%B0%B1%EC%A4%80/Gold/2448.%E2%80%85%EB%B3%84%E2%80%85%EC%B0%8D%EA%B8%B0%E2%80%85%EF%BC%8D%E2%80%8511/README.md)|
 |2457. 공주님의 정원|[링크](./%EB%B0%B1%EC%A4%80/Gold/2457.%E2%80%85%EA%B3%B5%EC%A3%BC%EB%8B%98%EC%9D%98%E2%80%85%EC%A0%95%EC%9B%90/README.md)|
 |2470. 두 용액|[링크](./%EB%B0%B1%EC%A4%80/Gold/2470.%E2%80%85%EB%91%90%E2%80%85%EC%9A%A9%EC%95%A1/README.md)|
+|2629. 양팔저울|[링크](./%EB%B0%B1%EC%A4%80/Gold/2629.%E2%80%85%EC%96%91%ED%8C%94%EC%A0%80%EC%9A%B8/README.md)|
 |2638. 치즈|[링크](./%EB%B0%B1%EC%A4%80/Gold/2638.%E2%80%85%EC%B9%98%EC%A6%88/README.md)|
 |3190. 뱀|[링크](./%EB%B0%B1%EC%A4%80/Gold/3190.%E2%80%85%EB%B1%80/README.md)|
 |5557. 1학년|[링크](./%EB%B0%B1%EC%A4%80/Gold/5557.%E2%80%851%ED%95%99%EB%85%84/README.md)|