example(@nestjs) fix HttpExceptionFilter example (missing status)

Author: kamilmysliwiec

sample/01-cats-app/src/common/filters/http-exception.filter.ts

@@ -7,9 +7,10 @@ export class HttpExceptionFilter implements ExceptionFilter {
     const ctx = host.switchToHttp();
     const response = ctx.getResponse();
     const request = ctx.getRequest();
+    const statusCode = exception.getStatus();
 
-    response.status(status).json({
-      statusCode: exception.getStatus(),
+    response.status(statusCode).json({
+      statusCode,
       timestamp: new Date().toISOString(),
       path: request.url,
     });