[#3683] Addressed dhcp6_hooks.doc comments

Author: fxdupont

src/bin/dhcp6/dhcp6_hooks.dox

@@ -1,4 +1,4 @@
-// Copyright (C) 2013-2024 Internet Systems Consortium, Inc. ("ISC")
+// Copyright (C) 2013-2025 Internet Systems Consortium, Inc. ("ISC")
 //
 // This Source Code Form is subject to the terms of the Mozilla Public
 // License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -355,13 +355,14 @@ called before "subnet6_select".
   - name: @b new_lease6, type: isc::dhcp::Lease6Ptr, direction: <b>in<b>
 
  - @b Description: this callout is executed when an addr-reg-inform was
-   received and successfully processed before the lease operation which
-   maintains when not skipped the registration state.
-
- - <b>Next step status</b>: If any callout sets the status to SKIP, the
-   lease operation (add or update) will be skipped. If any callout sets the
-   status to DROP, the server will cancel current packet processing and
-   the query dropped.
+   received and successfully processed but before the lease operation which
+   maintains the registration state when not skipped.
+
+ - <b>Next step status</b>: If any callout sets the status to SKIP,
+   the lease operation (add or update) will be skipped but the
+   response sent and DNS updates handled for the part not relying on
+   leases.  If any callout sets the status to DROP, the server will
+   cancel current packet processing and the query dropped.
 
 @subsection dhcpv6Leases6Committed leases6_committed