Update block size in block size limit test

Use the new size of the valid block.

Author: jvff

linera-chain/src/unit_tests/chain_tests.rs

@@ -115,7 +115,7 @@ async fn test_block_size_limit() {
     let mut chain = ChainStateView::new(chain_id).await;
 
     // The size of the executed valid block below.
-    let maximum_executed_block_size = 721;
+    let maximum_executed_block_size = 722;
 
     // Initialize the chain.
     let mut config = make_open_chain_config();