rectifies 3 and above to only 3

Author: Amrita

modules/understanding-agent-install.adoc

@@ -54,7 +54,7 @@ Recommended cluster resources for the following topologies:
 |Topology|Number of master nodes|Number of worker nodes|vCPU|Memory|Storage
 |Single-node cluster|1|0|8 vCPU cores|16GB of RAM| 120GB
 |Compact cluster|3|0 or 1|8 vCPU cores|16GB of RAM|120GB
-|HA cluster|3 and above|2 and above |8 vCPU cores|16GB of RAM|120GB
+|HA cluster|3|2 and above |8 vCPU cores|16GB of RAM|120GB
 |====