book: remove v6.2 references in HA chapter

docs/TheBook/src/main/markdown/cookbook-ha-with-replicable-services.md

@@ -107,7 +107,7 @@ suffix (although they internally are represented with an `@local` suffix). E.g.
 `PnfsManager@namespaceDomain` is a fully qualified cell address and identifies a
 specific cell instance, while `PnfsManager` is a logical address.
 
-In dCache 6.2, many -- although not all -- services are replicable. A
+In dCache, many -- although not all -- services are replicable. A
 replicable service is one that supports the above separation between a logical
 address and a physical address and which supports having several physical
 instances use the same logical address. One may recognize replicable services by
@@ -127,7 +127,7 @@ route delete PnfsManager PnfsManager@namespaceDomain
 After this, no new requests will reach that `pnfsmanager` instance and once the
 service is idle it may be shut down.
 
-The following is a list of critical replicable services in dCache 6.2.
+The following is a list of critical replicable services in dCache.
 
 ### `spacemanager`
 
@@ -156,7 +156,6 @@ ha get role
 ha show participants
 ```
 
-
 ### `srmmanager`
 
 Srmmanager is fully replicable. Several instance must have separate databases.
@@ -201,7 +200,7 @@ Non-critical services will not directly affect transfers in case of
 unavailabilty. As such, it may be unnecessary to replicate these services if the
 primary interest is rolling upgrades.
 
-The following is a list of non-critical replicable services in dCache 6.2.
+The following is a list of non-critical replicable services in dCache.
 
 ### `billing`