chore: v0.44.6 changelog and release notes (#10953)

* chore: v0.44.6 changelog and release notes

* Update

* update date

CHANGELOG.md

@@ -37,11 +37,13 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+## [v0.44.6](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.44.6) - 2022-02-02
+
 ### Bug Fixes
 
 * (grpc) [\#10985](https://github.com/cosmos/cosmos-sdk/pull/10992) The `/cosmos/tx/v1beta1/txs/{hash}` endpoint returns a 404 when a tx does not exist.
 * (std/codec) [/#10595](https://github.com/cosmos/cosmos-sdk/pull/10595) Add evidence to std/codec to be able to decode evidence in client interactions. 
-* [#10725](https://github.com/cosmos/cosmos-sdk/pull/10725) populate `ctx.ConsensusParams` for begin/end blockers.
+* [#10725](https://github.com/cosmos/cosmos-sdk/pull/10725) populate `ctx.ConsensusParams` for begin/end blockers.
 * [\#10061](https://github.com/cosmos/cosmos-sdk/pull/10061) and [\#10515](https://github.com/cosmos/cosmos-sdk/pull/10515) Ensure that `LegacyAminoPubKey` struct correctly unmarshals from JSON
 
 ### Improvements

RELEASE_NOTES.md

@@ -1,10 +1,12 @@
-# Cosmos SDK v0.44.5 Release Notes
+# Cosmos SDK v0.44.6 Release Notes
 
 This release introduces bug fixes and improvements on the Cosmos SDK v0.44 series:
 
-- Emit ante handler events for failed transactions: ant events can cause blockchain change (eg tx fees) and related events should be emitted.
-- (fix) Upgrade IAVL to 0.17.3 to solve race condition bug in IAVL.
+- Populate `ctx.ConsensusParams` for begin/end blockers.
+- Significantly speedup iterator creation after delete heavy workloads, which significantly improves IBC migration times.
+- Ensure that `LegacyAminoPubKey` struct correctly unmarshals from JSON.
+- Add evidence to std/codec to be able to decode evidence in client interactions.
 
-See the [Cosmos SDK v0.44.5 Changelog](https://github.com/cosmos/cosmos-sdk/blob/v0.44.5/CHANGELOG.md) for the exhaustive list of all changes.
+See the [Cosmos SDK v0.44.6 Changelog](https://github.com/cosmos/cosmos-sdk/blob/v0.44.6/CHANGELOG.md) for the exhaustive list of all changes.
 
-**Full Changelog**: https://github.com/cosmos/cosmos-sdk/compare/v0.44.4...v0.44.5
+**Full Changelog**: https://github.com/cosmos/cosmos-sdk/compare/v0.44.5...v0.44.6