CHANGELOG.md in tee_logger-2.4.0 vs CHANGELOG.md in tee_logger-2.4.1

@@ -1,4 +1,8 @@
+# v2.4.1
+- update README.md
+- and YARD comment
+
 # v2.4.0
 - TeeLogger#disable is allow block given
 
 # v2.3.1
 - refactoring TeeLogger#disable