Update ternary operator

Author: dontru

README.md

@@ -152,6 +152,14 @@ There are two ways to express `if`...`else` statement
 condition ? m : n
 ```
 
+```WebAssembly
+(get_local $condition)
+(select
+  (get_local $m)
+  (get_local $n)
+)
+```
+
 ```WebAssembly
 (select
   (get_local $m)