Update state-providers.md (#1542)

typo on data provider -> state provider

Author: Gu3

core/state-providers.md

@@ -13,7 +13,7 @@ retrieve data for a given resource will be used.
 
 To do so you need to implement the `ApiPlatform\State\ProviderInterface`.
 
-In the following examples we will create custom data providers for an entity class called `App\Entity\BlogPost`.
+In the following examples we will create custom state providers for an entity class called `App\Entity\BlogPost`.
 Note, that if your entity is not Doctrine-related, you need to flag the identifier property by using
 `#[ApiProperty(identifier: true)` for things to work properly (see also [Entity Identifier Case](serialization.md#entity-identifier-case)).