Update src/config.rs

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: Randy808

src/config.rs

@@ -56,7 +56,7 @@ pub struct Config {
     /// Higher values reduce CPU load from cache misses but use more RAM
     pub db_block_cache_mb: usize,
 
-    /// RocksDB parallelism level (background compaction  flush threads)
+    /// RocksDB parallelism level (background compaction and flush threads)
     /// Recommendation: Set to number of CPU cores for optimal performance
     /// This configures max_background_jobs and thread pools automatically
     pub db_parallelism: usize,