Fix "test go code" in environments repo

[tom-j-smith]

Background

The "Test go code" action appears to have been failing for a long time.
This was recently noticed failing when merging in a PR as a part of #5568. Failed test from the PR
Fix the test or fix the reason the test is failing.

Proposed user journey

The Test go code action should be passing

Approach

Which part of the user docs does this impact

Communicate changes

• post for #cloud-platform-update
• Weeknotes item
• Show the Thing/P&A All Hands/User CoP
• Announcements channel

Questions / Assumptions

Definition of done

• readme has been updated
• user docs have been updated
• another team member has reviewed
• smoke tests are green
• prepare demo for the team

Reference

How to write good user stories

[tom-j-smith]

Should be related to #6379 being fixed.