Keep Unix credential-entry assertions formatted for CI

PR #2368 exact head ee2fb78d05 failed Frontend formatting in Build and Test run 36890020802. Apply Prettier line wrapping only; the assertion and reviewed runtime source are unchanged.

Contract-Neutral: Formatting-only test reconciliation; no runtime, documentation or contract change.
Change-source: pulse-maintainer

frontend-modern/src/components/Settings/__tests__/InfrastructureOperationsModel.test.tsx

@@ -287,7 +287,9 @@ describe('infrastructure operations model', () => {
     expect(infrastructureInstallerSectionSource).toContain(
       'Generate an install token first. Then copy the command for the target host and',
     );
-    expect(infrastructureInstallerSectionSource).toContain('follow its credential-entry instructions.');
+    expect(infrastructureInstallerSectionSource).toContain(
+      'follow its credential-entry instructions.',
+    );
     expect(infrastructureInstallerSectionSource).toContain(
       'commands keep it separate: copy the command first, then use Show token only.',
     );