types: use node: prefix for builtins (#312)

Author: Fdawgs

types/index.d.ts

@@ -1,5 +1,5 @@
 /// <reference types="node" />
-import { IncomingMessage, ServerResponse, Server } from 'http';
+import { IncomingMessage, ServerResponse, Server } from 'node:http';
 import { FastifyRequest, FastifyPluginCallback, RawServerBase, RawServerDefault, RawRequestDefaultExpression, RawReplyDefaultExpression, RequestGenericInterface, ContextConfigDefault, FastifyInstance, FastifySchema, FastifyTypeProvider, FastifyTypeProviderDefault, FastifyBaseLogger } from 'fastify';
 import * as fastify from 'fastify';
 import * as WebSocket from 'ws';