Another minor grammar fix

Author: rao-shwe

modules/install/pages/deployment-considerations-lt-3nodes.adoc

@@ -82,7 +82,7 @@ Therefore, continue to monitor the RAM and CPU use of your arbiter node, especia
 
 === Metadata Management
 
-In Couchbase Server 7.0 and a later versions, metadata is managed by means of _Chronicle_; which is a _consensus-based_ system, based on the https://raft.github.io/[Raft^] algorithm.
+In Couchbase Server 7.0 and later versions, metadata is managed by means of _Chronicle_; which is a _consensus-based_ system, based on the https://raft.github.io/[Raft^] algorithm.
 Due to the strong consistency with which topology-related metadata is thus managed, in the event of a _quorum failure_ (meaning, the unresponsiveness of at least half of the cluster's nodes -- for example, the unresponsiveness of one node in a two-node cluster), no modification of nodes, buckets, scopes, and collections can take place until the quorum failure is resolved.