docs(security): rename package helmet for fastify

Author: Tony133

content/security/helmet.md

@@ -24,21 +24,21 @@ app.use(helmet());
 
 #### Use with Fastify
 
-If you are using the `FastifyAdapter`, install the [fastify-helmet](https://github.com/fastify/fastify-helmet) package:
+If you are using the `FastifyAdapter`, install the [@fastify/helmet](https://github.com/fastify/fastify-helmet) package:
 
 ```bash
-$ npm i --save fastify-helmet
+$ npm i --save  @fastify/helmet
 ```
 
 [fastify-helmet](https://github.com/fastify/fastify-helmet) should not be used as a middleware, but as a [Fastify plugin](https://www.fastify.io/docs/latest/Reference/Plugins/), i.e., by using `app.register()`:
 
 ```typescript
-import { fastifyHelmet } from 'fastify-helmet';
+import { fastifyHelmet } from '@fastify/helmet';
 // somewhere in your initialization file
 await app.register(fastifyHelmet);
 ```
 
-> warning **Warning** When using `apollo-server-fastify` and `fastify-helmet`, there may be a problem with [CSP](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP) on the GraphQL playground, to solve this collision, configure the CSP as shown below:
+> warning **Warning** When using `apollo-server-fastify` and `@fastify/helmet`, there may be a problem with [CSP](https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP) on the GraphQL playground, to solve this collision, configure the CSP as shown below:
 >
 > ```typescript
 > await app.register(fastifyHelmet, {