Update pool/const.go

Co-authored-by: Alexander Tulchinskiy  <38702085+DerekBum@users.noreply.github.com>

Author: KaymeKaydex

pool/const.go

@@ -34,7 +34,7 @@ type Role uint32
 const (
 	// UnknownRole - the connection pool was unable to detect the instance mode.
 	UnknownRole Role = iota // unknown
-	// MasterRole - the instance is read-write mode.
+	// MasterRole - the instance is in read-write mode.
 	MasterRole // master
 	// ReplicaRole - the instance is in read-only mode.
 	ReplicaRole // replica