v4.29.0

What's Changed

• chore: [ES|QL] Update grammars and definitions by @elastic-vault-github-plugin-prod[bot] in #256
• [ES|QL] Highlight command optional arguments by @momovdg in #258
• chore: version packages by @github-actions[bot] in #257

Full Changelog: v4.28.0...v4.29.0