[Bouncer] Tweak businesslink config
[Bouncer] Tweak businesslink config

try_files with $uri and $uri.html is used in redirector and seems to be a
common pattern in nginx configs.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet