fix: fix payload file filter prefix in replay-payloads (#21255)

bin/reth-bench/src/bench/replay_payloads.rs

@@ -180,7 +180,7 @@ impl Command {
             .filter_map(|e| e.ok())
             .filter(|e| {
                 e.path().extension().and_then(|s| s.to_str()) == Some("json") &&
-                    e.file_name().to_string_lossy().starts_with("payload_")
+                    e.file_name().to_string_lossy().starts_with("payload_block_")
             })
             .collect();