manual: update Dynamic DNS for native backend changes

source/manual/dynamic_dns.rst

@@ -31,14 +31,14 @@ Option                  Description
 ======================= =======================================================================================================================================================================
 Enable                  Enable the client
 Interval                The number of seconds address changes will be queried
-Backend                 Select the backend to use, either ddclient or the new OPNsense implementation
+Backend                 Select the backend to use, either "ddclient" or "native"
 ======================= =======================================================================================================================================================================
 
 .. Note::
 
-      With :code:`ddlient` developments sunsetting [`* <https://github.com/ddclient/ddclient/issues/528>`__]  we decided to offer an alternative written
-      in python. Selecting the OPNsense backend changes the implementation. If your service is supported, we do advice to try out the
-      new implementation.
+      With :code:`ddlient` developments sunsetting [`* <https://github.com/ddclient/ddclient/issues/528>`__] we decided to offer an alternative written in
+      Python. Selecting the native backend replaces the employed implementation. If your service is supported, we do advice to try out the new native backend
+      which also offers support for custom HTTP requests.
 
 Accounts
 ---------------------------