Update changelog

Author: thecrypticace

packages/vscode-tailwindcss/CHANGELOG.md

@@ -10,6 +10,8 @@
 - Don't suggest at-rules when nested that cannot be used in a nested context ([#1127](https://github.com/tailwindlabs/tailwindcss-intellisense/pull/1127))
 - Make sure completions work when using prefixes in v4 ([#1129](https://github.com/tailwindlabs/tailwindcss-intellisense/pull/1129))
 - Add support for `@reference` ([#1117](https://github.com/tailwindlabs/tailwindcss-intellisense/pull/1117))
+- Add support for `--theme(…)`, `--utility(…)`, and `--modifier(…)` ([#1117](https://github.com/tailwindlabs/tailwindcss-intellisense/pull/1117))
+- Add basic completions for `--utility(…)` and `--modifier(…)` ([#1117](https://github.com/tailwindlabs/tailwindcss-intellisense/pull/1117))
 
 ## 0.12.18