message: Update CHANGELOG.md
  Adding what got updated in 6.7.2
diff: +# 6.7.2 - 2022-07-28
  +
  +- [615](https://github.com/chromaui/chromatic-cli/pull/615) Changed trim stats to stream and added test.
  +
  # 6.7.1 - 2002-07-22
  - [612](https://github.com/chromaui/chromatic-cli/pull/612) Add change count to buildPassed message if changes exist.
  