wordpress: Restore access to page at URL /resources/

* https://jquerymobile.com/resources/
* https://stage.jquerymobile.com/resources/

The old configuration in private repo at
https://github.com/jquery/infrastructure, used the following:

```
rewrite /resources/?$ /index.php$is_args$args;

location ^~ /resources/ {
    alias /var/www/wordpress/gw-resources/$host/;
}
```

Author: Krinkle

modules/wordpress/templates/site/site.nginx.erb

@@ -25,7 +25,9 @@ server {
   include /etc/nginx/wordpress-subsites/<%= @host %>.d/*.conf;
 
 <%- if @gilded_wordpress -%>
-  location ~ ^/resources/(?<name>.*) {
+  # Avoid matching /resources/ itself as that can be a real page
+  # https://jquerymobile.com/resources/
+  location ~ ^/resources/(?<name>.+) {
     alias <%= @base_path %>/gw-resources/<%= @host %>/$name;
   }
 <%- end -%>