Fix robots blocking of /apply-for-a-licence
Fix robots blocking of /apply-for-a-licence

Content under /apply-for-a-licence/ should be blocked from robots,
because we want people to access it via the license start pages (eg, via
https://www.gov.uk/temporary-events-notice/westminster/apply for
https://www.gov.uk/apply-for-a-licence/temporary-event-notice/westminster/apply-1)
which have more explanatory content, and rank well in search.

However, robots.txt exclusions are prefixes, so this line was also
banning https://www.gov.uk/apply-for-a-licence-to-use-an-orphan-work
from being indexed.  In turn, this was causing search engines such as
Google and Bing to display a description for this page of "A description
for this result is not available because of this site's robots.txt".
Further, Bing was attempting to guess a title from the URL and other
off-page information, and was picking "How to Apply for a License to Use
an Orphan Work"; note the incorrect spelling of "License".

Adding a trailing / to the exclusion line should avoid it catching such
cases.

kalleth/static,kalleth/static,alphagov/static,tadast/static,robinwhittleton/static,kalleth/static,tadast/static,robinwhittleton/static,alphagov/static,alphagov/static,robinwhittleton/static,tadast/static,kalleth/static,tadast/static,robinwhittleton/static