rename ClientParams gRPC method to Params (#2573)

* rename ClientParams to Params

* add changelog

* review comment to update rest api url

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

CHANGELOG.md

@@ -65,6 +65,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (04-channel) [\#2024](https://github.com/cosmos/ibc-go/pull/2024) Channel Keeper now expects a keeper which fulfills the expected `ScopedKeeper` interface for the capability keeper.
 * (core/04-channel)[\#1703](https://github.com/cosmos/ibc-go/pull/1703) Update `SendPacket` API to take in necessary arguments and construct rest of packet rather than taking in entire packet. The generated packet sequence is returned by the `SendPacket` function.
 * (modules/apps/27-interchain-accounts) [\#2433](https://github.com/cosmos/ibc-go/pull/2450) Renamed icatypes.PortPrefix to icatypes.ControllerPortPrefix & icatypes.PortID to icatypes.HostPortID
+* (core/02-client) [\#2573](https://github.com/cosmos/ibc-go/pull/2573) Renames `ClientParams` gRPC query method to `Params`.
 * (testing) [\#2567](https://github.com/cosmos/ibc-go/pull/2567) Modify `SendPacket` API of `Endpoint` to match the API of `SendPacket` in 04-channel.
 
 ### State Machine Breaking