Update template.tpl allowed string url

[rivajunior]

Given the following GTM rule, a URL match must specify a path pattern. Since this script is only supposed to load a ${id}.js file, the url string should assert for it:

Each URL match pattern must use HTTPS and specify both host and path patterns. The host can be a domain (e.g. 'example.org') or a specific subdomain (e.g. 'static.www.example.org'), and optionally be prefixed by a wildcard (e.g. '*.www.example.org'); in the latter case, requests to 'www.example.org' and any subdomains will be allowed. The path pattern must consist of '/' followed by zero or more characters. An asterisk in the path pattern will be interpreted as a wildcard. A path with no trailing characters will be treated as a wildcard.