modify variable name

Author: Manav-Aggarwal

crates/evolve/src/config.rs

@@ -1,7 +1,7 @@
 use serde::{Deserialize, Serialize};
 
 /// Default maximum bytes for txpool transactions (1.85 MiB)
-pub const DEFAULT_MAX_TXPOOL_BYTES: u64 = (1.85 * 1024.0 * 1024.0).round() as u64; // 1.85 MiB = 1,939,866 bytes
+pub const DEFAULT_MAX_TXPOOL_BYTES: u64 = 1_939_866; // 1.85 MiB = 1,939,866 bytes
 
 /// Configuration for Rollkit-specific functionality
 #[derive(Debug, Clone, Serialize, Deserialize)]