test(nodejs): give the multivector index test a realistic timeout

Index build plus two searches runs right at Jest's 5s default on CI
macs and flakes when suite parallelism contends for cores.

nodejs/__test__/table.test.ts

@@ -2953,7 +2953,7 @@ describe("column name options", () => {
       .limit(10)
       .toArray();
     expect(results2.length).toBe(10);
-  });
+  }, 30_000);
 });
 
 describe("when creating an empty table", () => {