docs: use new nuxi module add command in installation (#479)

Author: danielroe

docs/content/1.getting-started/1.quick-start.md

@@ -10,15 +10,9 @@ Get started by creating a quick demo with the [SpaceX GraphQL API](https://api.s
 ## Setup
 
 1. **Add `nuxt-graphql-client` dependency to your project**
-
-::code-group
-```bash [Yarn]
-yarn add nuxt-graphql-client
+```bash
+npx nuxi@latest module add graphql-client
 ```
-```bash [NPM]
-npm install nuxt-graphql-client
-```
-::
 
 2. **Enable the module in your nuxt configuration**
 

docs/content/1.index.md

@@ -12,7 +12,7 @@ cta:
 secondary:
   - Open on GitHub →
   - https://github.com/diizzayy/nuxt-graphql-client
-snippet: yarn add nuxt-graphql-client
+snippet: npx nuxi@latest module add graphql-client
 ---
 
 #title