Simplify wording for concise TOC

Author: lilin90

TOC.md

@@ -140,8 +140,8 @@
     - [TiSpark Topology](/tispark-deployment-topology.md)
     - [Cross-DC Topology](/geo-distributed-deployment-topology.md)
     - [Hybrid Topology](/hybrid-deployment-topology.md)
-  - [Deploy a TiDB Cluster Using TiUP](/production-deployment-using-tiup.md)
-  - [Deploy a TiDB Cluster on Kubernetes](/tidb-in-kubernetes.md)
+  - [Deploy Using TiUP](/production-deployment-using-tiup.md)
+  - [Deploy on Kubernetes](/tidb-in-kubernetes.md)
   - [Verify Cluster Status](/post-installation-check.md)
   - Test Cluster Performance
     - [Test TiDB Using Sysbench](/benchmark/benchmark-tidb-using-sysbench.md)