Merge pull request #5882 from EnterpriseDB/docs/pgd/fix/quorum-cover-…

…locks

Update terminology.mdx quorum

product_docs/docs/pgd/5/terminology.mdx

@@ -89,7 +89,8 @@ Traditionally, in PostgreSQL, a number of databases running on a single server i
 
 #### Quorum
 
-When a [Raft](#replicated-available-fault-tolerance-raft) [consensus](#consensus) is needed by a PGD cluster, a minimum number of voting nodes participating in the vote are needed. This number is called a quorum. For example, with a 5-node cluster, the quorum is 3 nodes in the cluster voting. A consensus is 5/2+1 nodes, 3 nodes voting the same way. If there are only 2 voting nodes, then a consensus is never established.
+A quorum is the minimum number of voting nodes needed to participate in a distributed vote. It ensures that the decision made has validity. For example,
+when a [Raft](#replicated-available-fault-tolerance-raft) [consensus](#consensus) is needed by a PGD cluster, a minimum number of voting nodes participating in the vote are needed. With a 5-node cluster, the quorum is 3 nodes in the cluster voting. A consensus is 5/2+1 nodes, 3 nodes voting the same way. If there are only 2 voting nodes, then a consensus is never established. Quorums are required in PGD for [global locks](ddl/ddl-locking/) and Raft decisions.
 
 #### Replicated available fault tolerance (Raft)