Use more realistic example email address in setup

Per RFC 2606 the @whatever.example is a valid version of the
standard @example.com domain used for emails, and allows for
another domain in the use for the per-repo config setting.

intermediate/index.md

@@ -97,14 +97,14 @@ To set the same values to apply to *any* of your repositories:
 
 ```shell
 $ git config --global user.name "your name"
-$ git config --global user.email "your@email"
+$ git config --global user.email "[email protected]"
 ```
 
 For a configuration specific to just the repository folder you're currently working in:
 
 ```shell
 $ git config user.name "[your full name]"
-$ git config user.email "[[email protected]]"
+$ git config user.email "[[email protected]]"
 ```
 
 #### Scopes