Fixed README

Author: rijnb

README.md

@@ -49,6 +49,8 @@ decode Mapcodes.
 
     Added the India state Telangana (IN-TG), until 2014 a region in Adhra Pradesh.
 
+    Fixed a problem with the "extraDigits" parameter of the "mapcode" utility.
+
 * 1.40
 
     Added extraDigits parameter to allow high-precision mapcodes to be generated.