fix(test): correct arborist-helpers mock path for idToNpmPurl

Update mock path from ../../utils/spec.mts to ../../utils/ecosystem/spec.mts
to match actual implementation import

Author: jdalton

packages/cli/src/shadow/npm/arborist-helpers.test.mts

@@ -20,7 +20,7 @@ vi.mock('../../utils/socket/alerts.mts', () => ({
   getAlertsMapFromPurls: mockGetAlertsMapFromPurls,
 }))
 
-vi.mock('../../utils/spec.mts', () => ({
+vi.mock('../../utils/ecosystem/spec.mts', () => ({
   idToNpmPurl: mockIdToNpmPurl,
 }))