Gate Windows Shims CI job to upstream repository owner

[Copilot]

The failing Actions run was isolated to Windows Shims Tests, which failed on a post-test dirty-tree check (scripts/git-dirty.js) after dependency reset in fork context. This change scopes that job consistently with the rest of upstream-only CI jobs.

• Root-cause alignment

  • windows-shims was the only CI job in ci.yml without an upstream owner guard.
  • In non-npm forks, the job can produce dependency drift and fail on final git cleanliness checks.

• Workflow change

  • Added if: github.repository_owner == 'npm' to the windows-shims job in .github/workflows/ci.yml.
  • No other workflow logic or job steps changed.

windows-shims:
  name: Windows Shims Tests
  if: github.repository_owner == 'npm'
  runs-on: windows-latest

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues

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