Update APP_LINK_SETUP.md

[saperi22]

Summary of changes

• Update APP_LINK_SETUP.md

Checklist

• Added a changelog entry
• Relevant test coverage

Authors

List GitHub usernames for everyone who contributed to this pull request.

@saperi22, @richherrera

[tdchow]

I used these steps in the v5 dev doc updates. Do we need to update those steps as well?

[saperi22]

@tdchow When Rich and I were testing yesterday, these were the options shown. We were on sandbox.
Unless we know of any sandbox/production differences in the website, I think we'd want to update the other set of docs too, to be consistent and up to date.

[tdchow]

@tdchow When Rich and I were testing yesterday, these were the options shown. We were on sandbox. Unless we know of any sandbox/production differences in the website, I think we'd want to update the other set of docs too, to be consistent and up to date.

Sounds good! I'll open a PR updating the v5 docs with this change.