Update CHANGELOG

Author: shulhi

CHANGELOG.md

@@ -32,6 +32,7 @@
 - Fix "rescript format" with many files. https://github.com/rescript-lang/rescript-compiler/pull/7081
 - Fix bigint max, min https://github.com/rescript-lang/rescript-compiler/pull/7088
 - Fix parsing issue with nested variant pattern type spreads. https://github.com/rescript-lang/rescript-compiler/pull/7080
+- Fix variant cast to int. https://github.com/rescript-lang/rescript-compiler/pull/7058
 
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