Update content/exception-filters.md

Author: kamilmysliwiec

content/exception-filters.md

@@ -182,7 +182,7 @@ export class HttpExceptionFilter {
 
 > info **Hint** All exception filters should implement the generic `ExceptionFilter<T>` interface. This requires you to provide the `catch(exception: T, host: ArgumentsHost)` method with its indicated signature. `T` indicates the type of the exception.
 
-If you are using `@nestjs/platform-fastify` you can use `response.send()` instead of `response.json()`. Don't forget to import the correct types from `fastify`.
+> warning **Warning** If you are using `@nestjs/platform-fastify` you can use `response.send()` instead of `response.json()`. Don't forget to import the correct types from `fastify`.
 
 like this: