message: docs: move changelog entry
diff: ## master
  +### Fixes
  +
  +- `[jest-haste-map]` [**BREAKING**] Replaced internal data structures to improve performance ([#6960](https://github.com/facebook/jest/pull/6960))
  +
  ## 23.6.0
  ### Features
  - `[jest-ci]` Add `changedSince` to allowed watch mode configs ([#6955](https://github.com/facebook/jest/pull/6955))
  - `[babel-jest]` Add support for `babel.config.js` added in Babel 7.0.0 ([#6911](https://github.com/facebook/jest/pull/6911))
  -- `[jest-haste-map]` [**BREAKING**] Replaced internal data structures to improve performance ([#6960](https://github.com/facebook/jest/pull/6960))
  ### Fixes
  