fix: update beacon state serialization test to fulu (#1207)

fix: test beacon state serialization update to fulu

Co-authored-by: laborant <[email protected]>

Author: MuhtasimTanmoy

testing/beacon-api/tests/assets/state.json

@@ -10,16 +10,14 @@ use serde_json::Value;
 
 const PATH_TO_TEST_DATA_FOLDER: &str = "./tests/assets";
 
-/// TODO: Update test to Fulu
-#[ignore = "Update test to Fulu"]
 #[tokio::test]
 async fn test_beacon_state_serialization() -> anyhow::Result<()> {
     let original_json = read_json_file("state.json")?;
 
     let beacon_state: BeaconVersionedResponse<BeaconState> =
         serde_json::from_value(original_json.clone())?;
 
-    assert_eq!(beacon_state.version, "electra");
+    assert_eq!(beacon_state.version, "fulu");
     assert_eq!(beacon_state.data.latest_block_header.slot, 1);
     assert_eq!(
         beacon_state.data.latest_block_header.parent_root,