[docs] Update CHANGELOG

Author: KristjanESPERANTO

CHANGELOG.md

@@ -22,14 +22,20 @@ planned for 2025-07-01
 - Use `node --run` instead of `npm run` (#3764) and adapt `start:dev` script (#3773)
 - [workflow] Run linter and spellcheck with LTS node version (#3767)
 - [workflow] Split "Run test" step into two steps for more clarity (#3767)
+- [linter] Review linter setup
+  - Fix command to lint markdown in `CONTRIBUTING.md`
+  - Re-activate JSDoc linting and fix linting issues
+  - Refactor ESLint config to use `defineConfig` and `globalIgnores`
+  - Replace `eslint-plugin-import` with `eslint-plugin-import-x`
+  - Switch Stylelint config to flat format and simplify Stylelint scripts
 
-### Updated
+### Fixed
 
-- [core] Update dependencies
+- [fix] Handle spellcheck issues
 
-### Fixed
+### Updated
 
-- [docs] Fix command to lint markdown
+- [core] Update dependencies
 
 ## [2.31.0] - 2025-04-01