chore: INFENG-922: use correct gh_team tag for infrastructure

[davidfluck-hpe]

Ticket

INFENG-922

Description

This changeset fixes a tag/label value in the CircleCI config; gh_team: machine-user should be gh_team: machine-users (plural). This fixes some inconsistencies in cost tracking.

Test Plan

Probably unnecessary, although getting the test-e2e-hpc-gcp job to run would guarantee that the correct label is being applied. But unless label application isn't working at all, this only updates the value that's already being set.

Checklist

• Changes have been manually QA'd
• New features have been approved by the corresponding PM
• User-facing API changes have the "User-facing API Change" label
• Release notes have been added as a separate file under docs/release-notes/
  See Release Note for details.
• Licenses have been included for new code which was copied and/or modified from any external code

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.60%. Comparing base (dadf75e) to head (80b2029).
Report is 17 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #10077      +/-   ##
==========================================
- Coverage   54.60%   54.60%   -0.01%     
==========================================
  Files        1260     1260              
  Lines      157635   157635              
  Branches     3632     3630       -2     
==========================================
- Hits        86082    86077       -5     
- Misses      71419    71424       +5     
  Partials      134      134              

Flag	Coverage Δ
backend	45.37% <ø> (-0.01%)	⬇️
harness	72.74% <ø> (ø)
web	54.37% <ø> (ø)

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see 3 files with indirect coverage changes