fix: bug langchain await (#3775)

* fix: TypeError: object LangfuseResponseGeneratorSync can't be used in 'await'

* 🔧 (generalBugs-shard-1.spec.ts): remove unnecessary empty line to improve code readability

---------

Co-authored-by: cristhianzl <cristhian.lousa@gmail.com>

src/frontend/tests/extended/regression/generalBugs-shard-1.spec.ts

@@ -36,7 +36,6 @@ test("should delete rows from table message", async ({ page }) => {
   }
 
   await page.getByRole("heading", { name: "Basic Prompting" }).click();
-
   await page.waitForSelector('[title="fit view"]', {
     timeout: 100000,
   });