Apply suggestions from code review

Co-authored-by: teor <teor@riseup.net>

zebra-state/src/service/check.rs

@@ -102,7 +102,7 @@ where
 
 /// Check that the `prepared` block is contextually valid for `network`, using
 /// the `history_tree` up to and including the previous block.
-#[tracing::instrument(skip(prepared))]
+#[tracing::instrument(skip(prepared, history_tree))]
 pub(crate) fn block_commitment_is_valid_for_chain_history(
     prepared: &PreparedBlock,
     network: Network,