add missing changelog entries (#230)

* add missing changelog entries

* add missing entry

CHANGELOG.md

@@ -43,17 +43,18 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Bug Fixes
 
+* (modules) [\#223](https://github.com/cosmos/ibc-go/pull/223) Use correct Prometheus format for metric labels.
 * (06-solomachine) [\#214](https://github.com/cosmos/ibc-go/pull/214) Disable defensive timestamp check in SendPacket for solo machine clients.
-* (07-tendermint) [#\210](https://github.com/cosmos/ibc-go/pull/210) Export all consensus metadata on genesis restarts for tendermint clients.
+* (07-tendermint) [\#210](https://github.com/cosmos/ibc-go/pull/210) Export all consensus metadata on genesis restarts for tendermint clients.
 * (core) [\#200](https://github.com/cosmos/ibc-go/pull/200) Fixes incorrect export of IBC identifier sequences. Previously, the next identifier sequence for clients/connections/channels was not set during genesis export. This resulted in the next identifiers being generated on the new chain to reuse old identifiers (the sequences began again from 0).
 * (02-client) [\#192](https://github.com/cosmos/ibc-go/pull/192) Fix IBC `query ibc client header` cli command. Support historical queries for query header/node-state commands.
 * (modules/light-clients/06-solomachine) [\#153](https://github.com/cosmos/ibc-go/pull/153) Fix solo machine proof height sequence mismatch bug.
 * (modules/light-clients/06-solomachine) [\#122](https://github.com/cosmos/ibc-go/pull/122) Fix solo machine merkle prefix casting bug. 
 * (modules/light-clients/06-solomachine) [\#120](https://github.com/cosmos/ibc-go/pull/120) Fix solo machine handshake verification bug. 
 
-
 ### API Breaking
 
+* (04-channel) [\#220](https://github.com/cosmos/ibc-go/pull/220) Channel legacy handler functions were removed. Please use the MsgServer functions or directly call the channel keeper's handshake function.
 * (modules) [\#206](https://github.com/cosmos/ibc-go/pull/206) Expose `relayer sdk.AccAddress` on `OnRecvPacket`, `OnAcknowledgementPacket`, `OnTimeoutPacket` module callbacks to enable incentivization.
 * (02-client) [\#181](https://github.com/cosmos/ibc-go/pull/181) Remove 'InitialHeight' from UpdateClient Proposal. Only copy over latest consensus state from substitute client.
 * (06-solomachine) [\#169](https://github.com/cosmos/ibc-go/pull/169) Change FrozenSequence to boolean in solomachine ClientState. The solo machine proto package has been bumped from `v1` to `v2`.
@@ -77,6 +78,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Improvements
 
+* (04-channel) [\#220](https://github.com/cosmos/ibc-go/pull/220) Channel handshake events are now emitted with the channel keeper.
 * (core/02-client) [\#205](https://github.com/cosmos/ibc-go/pull/205) Add in-place and genesis migrations from SDK v0.42.0 to ibc-go v1.0.0. Solo machine protobuf defintions are migrated from v1 to v2. All solo machine consensus states are pruned. All expired tendermint consensus states are pruned.
 * (modules/core) [\#184](https://github.com/cosmos/ibc-go/pull/184) Improve error messages. Uses unique error codes to indicate already relayed packets.
 * (07-tendermint) [\#182](https://github.com/cosmos/ibc-go/pull/182) Remove duplicate checks in upgrade logic.