fix test offer essential (#3005)

Author: jremy42

internal/services/tem/offer_subscription_data_source_test.go

@@ -35,7 +35,7 @@ func TestAccDataSourceOfferSubscription_Basic(t *testing.T) {
 				`, orgID),
 				Check: resource.ComposeTestCheckFunc(
 					resource.TestCheckResourceAttrSet("data.scaleway_tem_offer_subscription.test", "project_id"),
-					resource.TestCheckResourceAttr("data.scaleway_tem_offer_subscription.test", "offer_name", "scale"),
+					resource.TestCheckResourceAttr("data.scaleway_tem_offer_subscription.test", "offer_name", "essential"),
 				),
 			},
 		},