test: Blockのシリアライズテストを修正

src/test/kotlin/dev/usbharu/hideout/activitypub/domain/model/BlockTest.kt

@@ -72,6 +72,7 @@ class BlockTest {
             .isEqualTo("https://misskey.usbharu.dev/blocks/9myf6e40vm")
         assertThat(from).extractingJsonPathStringValue("$.object")
             .isEqualTo("https://test-hideout.usbharu.dev/users/test-user2")
+        assertThat(from).extractingJsonPathStringValue("$.type").isEqualTo("Block")
 
     }
 }