doc: update CHANGELOG with release date

flavorjones · flavorjones · commit 26b0e2dfd4bb · 2024-09-26T23:04:15.000-04:00
[skip ci]
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,6 +1,6 @@
 ## [Unreleased]
 
-## v4.0.0.alpha.25
+## v4.0.0.alpha.25 / 2023-09-26
 
 * Update to [Tailwind CSS v4.0.0-alpha.25](https://github.com/tailwindlabs/tailwindcss/releases/tag/v4.0.0-alpha.25) @flavorjones
 
