Updated Mrbgems FAQ (markdown)

Mrbgems-FAQ.md

@@ -13,7 +13,7 @@ In mrubys root directory there is a file called build_config.rb that file is whe
 files and libraries to be linked if your creating your gem with C extensions. Inside the build_config.rb
 You can add this code in to add in your gems.
 ```ruby
-conf.gem 'path\to\gem'
+conf.gem '/path/to/gem'
 ```
 If you want to include an include path you do it by writing the code below in your gem specification inside
 your projects mrbgem.rake file.