update changelog

CHANGELOG.md

@@ -37,6 +37,28 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+## v0.47.8-ics-lsm
+
+This is a special cosmos-sdk release with support for both ICS and LSM.
+All the changes to the special release are state machine breaking - this release should 
+be used only to upgrade from [v0.45.16-ics-lsm](https://github.com/cosmos/cosmos-sdk/tree/v0.45.16-ics-lsm).
+
+### Bug Fixes
+
+As compared to [v0.47.8](https://github.com/cosmos/cosmos-sdk/tree/v0.47.8), 
+this release backports a series of fixes for issues found 
+  during the [Oak Security audit of SDK 0.47](https://github.com/oak-security/audit-reports/blob/master/Cosmos%20SDK/2024-01-23%20Audit%20Report%20-%20Cosmos%20SDK%20v1.0.pdf):
+  - Backport [sdk-#18146](https://github.com/cosmos/cosmos-sdk/pull/18146): Add denom check to reject denoms outside of those listed in `MinDeposit`. A new `MinDepositRatio` param is added (with a default value of `0.01`) and now deposits are required to be at least `MinDepositRatio*MinDeposit` to be accepted. ([sdk-#2919](https://github.com/cosmos/cosmos-sdk/pull/19312))
+  - Partially backport [sdk-#18047](https://github.com/cosmos/cosmos-sdk/pull/18047): Add a limit of 200 grants pruned per `EndBlock` in the feegrant module. ([sdk-#19314](https://github.com/cosmos/cosmos-sdk/pull/19314))
+  - Partially backport [skd-#18737](https://github.com/cosmos/cosmos-sdk/pull/18737): Add a limit of 200 grants pruned per `BeginBlock` in the authz module. ([sdk-#19315](https://github.com/cosmos/cosmos-sdk/pull/19315))
+  - Backport [sdk-#18173](https://github.com/cosmos/cosmos-sdk/pull/18173): Gov Hooks now returns error and are "blocking" if they fail. Expect for `AfterProposalFailedMinDeposit` and `AfterProposalVotingPeriodEnded` that will log the error and continue. ([sdk-#19305](https://github.com/cosmos/cosmos-sdk/pull/19305))
+  - Backport [sdk-#18189](https://github.com/cosmos/cosmos-sdk/pull/18189): Limit the accepted deposit coins for a proposal to the minimum proposal deposit denoms. ([sdk-#19302](https://github.com/cosmos/cosmos-sdk/pull/19302))
+  - Backport [sdk-#18214](https://github.com/cosmos/cosmos-sdk/pull/18214) and [sdk-#17352](https://github.com/cosmos/cosmos-sdk/pull/17352): Ensure that modifying the argument to `NewUIntFromBigInt` and `NewIntFromBigInt` doesn't mutate the returned value. ([sdk-#19293](https://github.com/cosmos/cosmos-sdk/pull/19293))
+
+### State Machine Breaking
+
+- Skip running `addDenomReverseIndex` in `bank/v3` migration as it is prohibitively expensive to run on the Cosmos Hub. ([sdk-#19266](https://github.com/cosmos/cosmos-sdk/pull/19266))
+
 ## [v0.47.8](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.47.8) - 2024-01-22
 
 ### Improvements