문서 업데이트

Author: gunkim

README.md

@@ -19,4 +19,8 @@
 - [행맨](hangman)
 - [문자열 계산기](string-calculator)
 - [뱅킹](banking)
-- [숫자야구](number-baseball)
+- [숫자야구](number-baseball)
+
+## Algorithm
+
+- [처리율 제한](rate-limiter)