test: align loader with unavailable demo

lib/portfolio-data.load.test.ts

@@ -206,7 +206,7 @@ describe("loadFeaturedProjects", () => {
       expect(result.map(({ id }) => id)).toEqual(featuredIds);
       expect(previous?.demoAvailability).toBe("available");
       expect(previous?.demoCheckedAt).toBe("2020-01-01T00:00:00.000Z");
-      expect(unknown?.demoAvailability).toBe("unknown");
+      expect(unknown?.demoAvailability).toBe("none");
       expect(unknown?.demoCheckedAt).toBeNull();
       expect(createProjectHealthSnapshot).toHaveBeenCalledTimes(1);
     } finally {