docs(adapters): split Fauna setup commands into two sections (#3877)

* feat(docs): Fauna Adapter setup commands split into two sections

* fix: removed extraneous newline from my contribution

Author: zpg6

packages/docs/docs/adapters/fauna.md

@@ -50,6 +50,8 @@ CreateCollection({ name: "accounts" })
 CreateCollection({ name: "sessions" })
 CreateCollection({ name: "users" })
 CreateCollection({ name: "verification_tokens" })
+```
+```javascript
 CreateIndex({
   name: "account_by_provider_and_provider_account_id",
   source: Collection("accounts"),