op-node: span-batch logging stye fixes

Co-authored-by: Adrian Sutton <adrian@oplabs.co>

op-node/rollup/derive/batch_queue.go

@@ -247,7 +247,7 @@ batchLoop:
 			remaining = append(remaining, batch)
 			continue
 		case BatchDrop:
-			batch.Batch.LogContext(bq.log).Warn("dropping batch",
+			batch.Batch.LogContext(bq.log).Warn("Dropping batch",
 				"l2_safe_head", l2SafeHead.ID(),
 				"l2_safe_head_time", l2SafeHead.Time,
 			)

op-node/rollup/derive/batches.go

@@ -53,7 +53,7 @@ func CheckBatch(ctx context.Context, cfg *rollup.Config, log log.Logger, l1Block
 		}
 		return checkSpanBatch(ctx, cfg, log, l1Blocks, l2SafeHead, spanBatch, batch.L1InclusionBlock, l2Fetcher)
 	default:
-		log.Warn("unrecognized batch type: %d", batch.Batch.GetBatchType())
+		log.Warn("Unrecognized batch type: %d", batch.Batch.GetBatchType())
 		return BatchDrop
 	}
 }