Update CHANGELOG.md

CHANGELOG.md

@@ -11,6 +11,7 @@ All notable changes to this project are documented in this file.
 -   Fixed: `font-family-no-missing-generic-family-keyword` false positives for Sass-variables with namespaces ([#4378](https://github.com/stylelint/stylelint/pull/4378)).
 -   Fixed: `font-weight-notation` false positives for `font-weight` ranges in `@font-face` ([#4372](https://github.com/stylelint/stylelint/pull/4372)).
 -   Fixed: `length-zero-no-unit` false positives for `line-height`, and for `fr` units ([#4394](https://github.com/stylelint/stylelint/pull/4394)).
+-   Fixed: `length-zero-no-unit` false positives for Less variables ([#4405](https://github.com/stylelint/stylelint/pull/4405)).
 -   Fixed: `selector-max-*` false negatives for rules with nested rules ([#4357](https://github.com/stylelint/stylelint/pull/4357)).
 -   Fixed: incorrect error message when parsing files with a broken syntax ([#4364](https://github.com/stylelint/stylelint/pull/4364)).