message: Consistent changelog heading
  I'm not sure if this is wanted. I noticed heading inconsistency when I was reading the changelog. Feel free to reject.
diff: * Add extra parameter `--runTestsByPath`. ([#4411](https://github.com/facebook/jest/pull/4411))
  * Upgrade all outdated deps ([#4425](https://github.com/facebook/jest/pull/4425))
  -# jest 21.0.1
  +## jest 21.0.1
  * Remove obsolete error ([#4417](https://github.com/facebook/jest/pull/4417))
  