message: fix: correcting a mislabeled CHANGELOG.md entry
diff: ### Fixes
  -* `[enzyme]` Allow matching of Errors against plain objects
  +* `[expect]` Allow matching of Errors against plain objects
  ([#5611](https://github.com/facebook/jest/pull/5611))
  * `[jest-cli]` Don't skip matchers for exact files
  ([#5582](https://github.com/facebook/jest/pull/5582))
  