message: Add `wasm_config_delete` addition to changelog
diff: ### Added
  - [#2026](https://github.com/wasmerio/wasmer/pull/2010) Expose trap code of a `RuntimeError`, if it's a `Trap`.
  +- [#2054](https://github.com/wasmerio/wasmer/pull/2054) Add `wasm_config_delete` to the Wasm C API.
  ### Changed
  - [#2042](https://github.com/wasmerio/wasmer/pull/2042) Parse more exotic environment variables in `wasmer run`.
  