fix syntax highlishting for generated code section

hamidb80 · hamidb80 · commit a82aa846c8fc · 2022-08-12T21:51:43.000+04:30
diff --git a/readme.md b/readme.md
@@ -14,7 +14,7 @@ The problem is that writing a full nested loop is a boring task, and using cloju
 
 
 ## example of generated code
-```
+```nim
 import std/sets, iterrr
 
 let 
