Fix typo of ktor-overview website page (#1968)

### 📝 Description

add `need`

### 🔗 Related Issues

original page:
https://opensource.expediagroup.com/graphql-kotlin/docs/server/ktor-server/ktor-overview#configuration

website/docs/server/ktor-server/ktor-overview.mdx

@@ -47,7 +47,7 @@ implementation("com.expediagroup", "graphql-kotlin-ktor-server", latestVersion)
 
 ## Configuration
 
-`graphql-kotlin-ktor-server` is a Ktor Server Plugin and you to manually install it in your [module](https://ktor.io/docs/modules.html).
+`graphql-kotlin-ktor-server` is a Ktor Server Plugin, and you need to manually install it in your [module](https://ktor.io/docs/modules.html).
 
 ```kotlin
 class HelloWorldQuery : Query {