fix: remove unnecessary end message from response in RequestInfoFromTableWithAIUseCaseV4

Author: Artuomka

backend/src/entities/ai/use-cases/request-info-from-table-with-ai-v4.use.case.ts

@@ -74,7 +74,7 @@ export class RequestInfoFromTableWithAIUseCaseV4
       userEmail,
       foundConnection,
     );
-    response.end('[END]');
+    response.end();
     try {
     } catch (error) {
       await slackPostMessage(error?.message);