Allow us to strip date from link generated

[DoNotResuscitate]

Take a file named 2018-10-10-hello-world.md. Zola when generating a URL will strip out the date and first - as stated in https://www.getzola.org/documentation/content/page/

"Another exception to this rule is that a filename starting with a datetime (YYYY-mm-dd or an RFC3339 datetime) followed by an underscore (_) or a dash (-) will use that date as the page date, unless already set in the front matter. The page name will be anything after _/-, so the file 2018-10-10-hello-world.md will be available at [base_url]/hello-world"

This means any pages linked in a Zola generated page are broken, as the link points to the file name with date included, while the page exists at the URL without the date.