Improve changelog: remove impl. details, parallel format

CHANGELOG.md

@@ -6,15 +6,14 @@ A breaking change will get clearly marked in this log.
 
 ## Unreleased
 
-### Added
-* Added a from method in `ContractClient` which takes the `ContractClientOptions` and instantiates the `ContractClient` by utilizing the `contractId` to retrieve the contract wasm from the blockchain. The custom section is then extracted and used to create a `ContractSpec` which is then used to create the client.
-* Similarly adds `fromWasm` and `fromWasmHash` methods in `ContractClient` which can be used to initialize a `ContractClient` if you already have the wasm bytes or the wasm hash along with the `ContractClientOptions`.
-* Added `getContractWasmByContractId` and `getContractWasmByHash` methods in `Server` which can be used to retrieve the wasm bytecode of a contract via its `contractId` and wasm hash respectively.
-
 ## [v12.0.0-rc.3](https://github.com/stellar/js-stellar-sdk/compare/v11.3.0...v12.0.0-rc.3)
 
-**This update supports Protocol 21**. It is an additive change to the protocol so there are no true backwards incompatibilities, but your software may break if you encounter new unexpected fields from this Protocol ([#949](https://github.com/stellar/js-stellar-sdk/pull/949)).
-
+### Added
+* New methods on `ContractClient` ([#960](https://github.com/stellar/js-stellar-sdk/pull/960)):
+  - `from(opts: ContractClientOptions)` instantiates the `ContractClient` by fetching the `contractId`'s WASM from the network to fill out the client's `ContractSpec`.
+  - `fromWasm` and `fromWasmHash` methods to instantiate a `ContractClient` when you already have the WASM bytes or hash alongside the `ContractClientOptions`.
+* New methods on `SorobanRpc.Server` ([#960](https://github.com/stellar/js-stellar-sdk/pull/960)):
+  - `getContractWasmByContractId` and `getContractWasmByHash` to retrieve a contract's WASM bytecode via its `contractId` or `wasmHash`, respectively.
 
 
 ## [v12.0.0-rc.2](https://github.com/stellar/js-stellar-sdk/compare/v11.3.0...v12.0.0-rc.2)