Fix example code for apache::vhost::php_values

The `php_values` parameter requires a Hash, but gives examples from the ~v7 era when other values were allowed.

Author: gcoxmoz

REFERENCE.md

@@ -9407,7 +9407,7 @@ Allows per-virtual host setting [`php_value`s](http://php.net/manual/en/configur
 These flags or values can be overwritten by a user or an application.
 Within a vhost declaration:
 ``` puppet
-  php_values    => [ 'include_path ".:/usr/local/example-app/include"' ],
+  php_values    => { 'include_path' => '.:/usr/local/example-app/include' },
 ```
 
 Default value: `{}`

manifests/vhost.pp

@@ -818,7 +818,7 @@
 #   These flags or values can be overwritten by a user or an application.
 #   Within a vhost declaration:
 #   ``` puppet
-#     php_values    => [ 'include_path ".:/usr/local/example-app/include"' ],
+#     php_values    => { 'include_path' => '.:/usr/local/example-app/include' },
 #   ```
 #
 # @param php_flags