Updating translation contributors list

ironikart · ironikart · commit 0d736954adc6 · 2019-04-15T13:06:02.000+10:00
diff --git a/README.markdown b/README.markdown
@@ -186,6 +186,7 @@ Special thanks to:
 
 * [nsulzycki](https://github.com/nsulzycki) (Polish Translation)
 * [dmassiani](https://github.com/dmassiani) (French Translation)
+* [jamadam](https://github.com/jamadam) (Japanese Translation)
 
 ## License
 
