Link 'Trade Tariff' to its website

[selfthinker]

Trello card

Description

This implements the suggested change in #2492, i.e. it links the words 'Trade Tariff' in the additional-commodity-code outcome to its respective website (https://www.gov.uk/trade-tariff).

The question artefacts correctly only contain that copy change.

Fact check

• Preview of changed example outcome
• Example outcome on production

Expected changes

E.g. /additional-commodity-code/y/5/70/0/6 includes the link. This affects any additional-commodity-code outcome if there is a commodity code.

[pmanrubia]

Thank you for your work on it.

Two minor comments:

1. We would need to fact-check this change with the department, so we need to create a Heroku app as described in this document.
2. Could you please update the description following a similar structure than Denmark marriage tool update - Content change request #2653, or Same sex marriage in Italy #2688. All our PRs for smart-answers follow a similar approach. It simplifies our deployment process.

I have just checked that Github is struggling to show the commit because we have too many artefacts. In general, it is better to follow the approach you have chosen for this PR because we have atomic PRs, but in this situations, we sometimes split the commit into a) commit with the changes, b) commit with artefacts. I am not suggesting to do it for this PR; it is absolutely fine what you have done it.

[selfthinker]

@pmanrubia, done both. Is the description okay this way?

[pmanrubia]

LGTM 👍

[pmanrubia]

@selfthinker I last thing..., could you please add a note to the card so we close the issue once it is deployed

[selfthinker]

The issue will automatically be closed by GitHub when this is merged into master (because I added closes #2492 to the commit message). But we should update the ticket manually anyway as it is more polite.