Merge branch 'roman-cketh-block-response-estimate' into 'master'

fix(cketh): increase the block size estimate

This change bumps the eth_getBlockByNumber response size estimate to
12KiB because most of the recent blocks are above the 6KiB limit. 

See merge request dfinity-lab/public/ic!16129

rs/ethereum/cketh/minter/src/eth_rpc_client/mod.rs

@@ -146,7 +146,7 @@ impl EthRpcClient {
                     block,
                     include_full_transactions: false,
                 },
-                ResponseSizeEstimate::new(6 * 1024),
+                ResponseSizeEstimate::new(12 * 1024),
             )
             .await;
         results.reduce_with_equality()