message: use starts_with for prefix filter
diff: @@ -684,7 +684,7 @@ pub(crate) fn get_votes_listings(_chain_id: &str, block_id: &str, persistent_sto
  // filter out the listings data
  let listings_data: ContextMap = ctxt.unwrap().into_iter()
  - .filter(|(k, _)| k.contains(&"data/votes/listings/"))
  + .filter(|(k, _)| k.starts_with(&"data/votes/listings/"))
  .collect();
  // convert the raw context data to VoteListings
  