[core] plugins: Fix string formatting in environment setup

[fabiencastan]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.08%. Comparing base (da1a5e4) to head (9101379).
⚠️ Report is 2 commits behind head on develop.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2894   +/-   ##
========================================
  Coverage    79.08%   79.08%           
========================================
  Files           51       51           
  Lines         6889     6889           
========================================
  Hits          5448     5448           
  Misses        1441     1441           

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