Update v4.0-performance-benchmarking-with-tpcc.md (pingcap#3949)

Co-authored-by: TomShawn <41534398+TomShawn@users.noreply.github.com>

Author: Joyinqin

benchmark/v4.0-performance-benchmarking-with-tpcc.md

@@ -19,7 +19,7 @@ This test aims to compare the TPC-C performance of TiDB 4.0 and TiDB 3.0 in the
 | PD        | m5.xlarge |     3     |
 | TiKV      | i3.4xlarge|     3     |
 | TiDB      | c5.4xlarge|     3     |
-| Sysbench  | m5.4xlarge|     1     |
+| TPC-C     | m5.4xlarge|     1     |
 
 ### Software version