docs: fix changelog release header for v1.12.1

Thavarshan · Thavarshan · commit fa28523a038a · 2026-05-24T17:22:00.000+05:30
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+## [v1.12.1](https://github.com/Thavarshan/phpvm/compare/v1.12.0...v1.12.1) - 2026-05-24
+
 ### Added
 
 - **`self-update` command:** Add `phpvm self-update` to automatically update phpvm to the latest stable release and print the updated version.
