Add two new paths where webchat is available
Add two new paths where webchat is available

As requested by HMRC, these two outcome pages from smart answers need
webchat assistance. The only change here is making the script load the
iframe on those two paths in addition to the self-assessment page.

alphagov/static,alphagov/static,kalleth/static,alphagov/static,kalleth/static,kalleth/static,kalleth/static