Release Notes update for 202405 release (#1871)

Updated the release notes for 202405 release

Updated the release notes for 202405 release with 2 more cherry picked features.

doc/release-notes/SONiC_202405_Release_Notes.md

@@ -74,6 +74,7 @@ Note : The kernel version is migrated to the version that is mentioned in the fi
 | ***HLD: DHCPv4 - Specify dhcp relay's Gateway explicitly with Primary address.*** | This feature implements the High Level Design of 'Secondary' interfaces of vlan. These secondary interfaces are also excluded in use in dhcpv4 relay. | [1470](https://github.com/sonic-net/SONiC/pull/1470) | [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |
 | ***NetScan over VLAN support*** | This feature implements the subnet decap feature HLD to support Netscan over VLAN.  | [1657](https://github.com/sonic-net/SONiC/pull/1657)  | [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |
 | ***NextHop Group Table Enhancement*** |  This feature implements the changes to handle recursive NHG entries | [1636](https://github.com/sonic-net/SONiC/pull/1636) | [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |
+| ***Notification to SAI that fast-reboot is done*** | This feature enables the notification for SAI that fastboot is done by setting SAI_SWITCH_ATTR_FAST_API_ENABLE to false when fastboot is done | [1396](https://github.com/sonic-net/sonic-sairedis/pull/1396) | [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |
 | ***RESTCONF infra enhancement*** | This feature adds the tests for openAPI spec generator, OpenAPI spec generator is enhanced to generate rest-server stubs, this replaces the OpenAPI-generator from community. Also removed the openAPI client generation and added Restconf document generator. Upgraded specs to openAPI 3.0. | [1679](https://github.com/sonic-net/SONiC/issues/1679) | [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |
 | ***SAI health monitor and dump generation*** | SAI monitoring feature, describes the behavior when SAI get stuck, NOS notifications and also changes concerning dump, health notification, shutdown and syslog depending on severity of occurred events. | [1533](https://github.com/sonic-net/SONiC/pull/1533) | [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |
 | ***SONiC container upgrade to Bookworm (Debian 12)*** | Upgradation on different dockers. | [](https://github.com/sonic-net/SONiC/issues/1541)  | [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |
@@ -87,6 +88,7 @@ Note : The kernel version is migrated to the version that is mentioned in the fi
 | ***UMF: OpenConfig YANG support for Physical Interfaces*** |	This feature implements the transformer support for openconfig interfaces.	| [1628](https://github.com/sonic-net/SONiC/pull/1628) | [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |
 | ***UMF subscription enhancement*** | This feature helps to verify REST and gNMI get/set operations on the build server itself and also fix the nil check during the subscribe request inside the handleTableXfmrCallback function. | [1705](https://github.com/sonic-net/SONiC/issues/1705) |  [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |
 | ***UMF: Transformer Infrastructure***	| This feature describes the design for SONiC Telemetry service and Translib infrastructure changes to support gNMI subscriptions and wildcard paths for YANG defined paths. | [1287](https://github.com/sonic-net/SONiC/pull/1287)	| [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |
+| ***Update calculation for dynamic buffer management*** | This feature fixes a bug in lossless headroom calculation regarding the small packet percentage which should be calculated in a size-based approach instead of packet-based and also adjust the Mellanox-specific lossless headroom calculation algorithm.    | [3235](https://github.com/sonic-net/sonic-swss/pull/3235)   | [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) | 
 | ***Upgrade FRR to 8.5.4*** | This feature upgrades the FRR 8.5.4 to include latest fixes.	| [18669](https://github.com/sonic-net/sonic-buildimage/pull/18669)	| [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |
 | ***Upgrade SWSS/SyncD to debian 12*** | Debian upgrade for SWSS and SyncD | [1670](https://github.com/sonic-net/SONiC/pull/1670) | [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |
 | ***Weighted-Cost Multi-Path*** | This feature provides general information about Weighted-Cost Multi-Path implementation in SONiC | [1629](https://github.com/sonic-net/SONiC/pull/1629)  | [Alpha](https://github.com/sonic-net/SONiC/blob/master/doc/SONiC%20feature%20quality%20definition.md) |