[less] Build-in LESS syntax hint error, multiple '&'

<!-- ⚠️⚠️ Do Not Delete This! bug_report_template ⚠️⚠️ --> <!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ --> <!-- 🕮 Read our guide about submitting issues: https://github.com/microsoft/vscode/wiki/Submitting-Bugs-and-Suggestions --> <!-- 🔎 Search existing issues to avoid creating duplicates. --> <!-- 🧪 Test using the latest Insiders build to see if your issue has already been fixed: https://code.visualstudio.com/insiders/ --> <!-- 💡 Instead of creating your report here, use 'Report Issue' from the 'Help' menu in VS Code to pre-fill useful information. --> <!-- 🔧 Launch with `code --disable-extensions` to check. --> Does this issue occur when all extensions are disabled?: Yes <!-- 🪓 If you answered No above, use 'Help: Start Extension Bisect' from Command Palette to try to identify the cause. --> <!-- 📣 Issues caused by an extension need to be reported directly to the extension publisher. The 'Help > Report Issue' dialog can assist with this. --> - VS Code Version: 1.64.2 - OS Version: Windows_NT x64 10.0.19042 Steps to Reproduce: 1. create a .less file (or change file type to less) 2. write the follow ```less .link { && {} } ``` 3.cursor focus on '&&', and vscode show the tips(that's wrong  4. follow the less official documentation - [Multiple `&`](https://lesscss.org/features/#parent-selectors-feature-multiple-)  it should be **element with a class list that includes both "link" and "link"**, NOT **element with class "link" ~descendant~ children of an element with class "link"** ```css .link.link {} // expected .link > .link {} // wrong ```