Update README.md

Propaganistas · Jul 21, 2017 · 4c43969 · 4c43969
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@@ -20,7 +20,7 @@ Adds phone number functionality to Laravel and Lumen based on the [PHP port](htt
     - [Number information](#number-information)
     - [Helper function](#helper-function)
 
-Looking for the documentation of version 2.*? Click [here](https://github.com/Propaganistas/Laravel-Phone/tree/v2).
+Looking for the documentation of version `2.*`? Click [here](https://github.com/Propaganistas/Laravel-Phone/tree/v2).
 
 ## Installation