message: Update CHANGELOG.md wording
diff: ## [UNRELEASED]
  -- Fix error where debug artifacts were not uploaded when the `init`
  -step failed. [#1159](https://github.com/github/codeql-action/pull/1159)
  +- In debug mode, debug artifacts are now uploaded even if a step in the Actions workflow fails. [#1159](https://github.com/github/codeql-action/pull/1159)
  ## 2.1.18 - 03 Aug 2022
  