update changelog

Author: randy-cro

CHANGELOG.md

@@ -40,7 +40,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (geth) [#665](https://github.com/crypto-org-chain/ethermint/pull/665) Update go-ethereum version to [`v1.15.11`](https://github.com/ethereum/go-ethereum/releases/tag/v1.15.11).
 * (evm) [#689](https://github.com/crypto-org-chain/ethermint/pull/689) Enable CancunTime and PragueTime in chain config migration.
 * (evm) [#691](https://github.com/crypto-org-chain/ethermint/pull/691) Remove active precompiles from VMContext 
-* (evm) [#694](https://github.com/crypto-org-chain/ethermint/pull/694) Remove non–go-ethereum JSON-RPC methods to align with Geth’s surface
+* (evm) [#694](https://github.com/crypto-org-chain/ethermint/pull/694) Remove miner(eth_hashrate and eth_mining) json rpc methods 
 
 ### Features