Fix relation type.

database/relations.md

@@ -751,7 +751,7 @@ class Supplier extends Model
 
 The first array parameter passed to the `$hasOneThrough` property is the name of the final model we wish to access, while the `through` key is the name of the intermediate model.
 
-Typical foreign key conventions will be used when performing the relationship's queries. If you would like to customize the keys of the relationship, you may pass them as the `key`, `otherKey` and `throughKey` parameters to the `$hasManyThrough` definition. The `key` parameter is the name of the foreign key on the intermediate model, the `throughKey` parameter is the name of the foreign key on the final model, while the `otherKey` is the local key.
+Typical foreign key conventions will be used when performing the relationship's queries. If you would like to customize the keys of the relationship, you may pass them as the `key`, `otherKey` and `throughKey` parameters to the `$hasOneThrough` definition. The `key` parameter is the name of the foreign key on the intermediate model, the `throughKey` parameter is the name of the foreign key on the final model, while the `otherKey` is the local key.
 
 ```php
 // Property style