Update changelog

Author: thecrypticace

packages/vscode-tailwindcss/CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - Don't suggest `--font-size-*` theme keys in v4.0 ([#1150](https://github.com/tailwindlabs/tailwindcss-intellisense/pull/1150))
 - Fix detection of Tailwind CSS version when using Yarn PnP ([#1151](https://github.com/tailwindlabs/tailwindcss-intellisense/pull/1151))
+- Add support for v4.x insiders builds ([#1123](https://github.com/tailwindlabs/tailwindcss-intellisense/pull/1123))
 
 ## 0.14.1