Update README.md

Author: BohuTANG

README.md

@@ -65,7 +65,7 @@ Databend uses the latest techniques in vectorized query processing to allow you
   Databend leverages data-level parallelism(Vectorized Query Execution) and instruction-level parallelism(SIMD) technology, offering blazing performance data analytics.
 
 
-- __Git-like Storage__
+- __Git-like MVCC Storage__
 
   Databend stores data with snapshots. It's easy to query, clone, and restore historical data in tables.