replace **[roles]** with **[roles]**

Fixes: apache#7

configuration.md.vtl

@@ -454,7 +454,7 @@ sha256Matcher.storedCredentialsHexEncoded = false
 <a name="Configuration-%5Croles%5C"></a>
 #[[####[roles]]]#
 
-The `**[roles]**` section allows you to associate [Permissions](permissions.html "Permissions") with the roles defined in the [users] section. Again, this is useful in environments with a small number of roles or where roles don't need to be created dynamically at runtime. Here's an example:
+The **`[roles]`** section allows you to associate [Permissions](permissions.html "Permissions") with the roles defined in the [users] section. Again, this is useful in environments with a small number of roles or where roles don't need to be created dynamically at runtime. Here's an example:
 
 ``` ini
 [roles]