Updated Release notes

[ci]

Signed-off-by: Pasindu Tennage <pasindu.tennage@digitalasset.com>

Author: pasindutennage-da

docs/src/release_notes.rst

@@ -117,9 +117,14 @@
 
     - Expose ``/v0/holdings/summary`` endpoint from scan proxy.
 
-    - Included support for ``scanClient`` configuration with three operation modes (``bft``, ``bft-custom``, and ``trust-single``) to define how the validator connects to scan.
+    - Add support for custom fault-tolerance configurations for ``scan`` and ``sequencer`` connections.
+      Please see :ref:`docs <helm-validator-install>` for details.
+      This is supported out of the box, only in the helm charts based deployment scripts.
+      New ``scanClient`` and ``synchronizer`` configs introduce a novel recommended way to configure the ``scan`` and ``sequencer`` connections.
+      Existing configuration options ``scanAddress``, ``nonSvValidatorTrustSingleScan``, ``decentralizedSynchronizerUrl``, ``useSequencerConnectionsFromScan`` are still supported, but will be deprecated in a future release.
+      We recommend to migrate to the new ``scanClient`` and ``synchronizer`` configuration options as soon as possible.
+      Check the updated :ref:`docs <helm-validator-install>` for more details.
 
-    - Included support for ``synchronizer`` configuration with three operation modes (``bft``, ``bft-custom``, and ``trust-single``) to define how the participant node of the validator connects to synchronizer.
 
 .. release-notes:: 0.5.6