Update CHANGELOG.md

Author: cristianoc

CHANGELOG.md

@@ -65,6 +65,7 @@
 - Ignore `@uncurry` attribute in uncurried mode, to avoid generating calls to `Curry` at runtime. https://github.com/rescript-lang/rescript-compiler/pull/6869
 - Avoid generating calls to Curry when adjusting arity of uncurried functions. https://github.com/rescript-lang/rescript-compiler/pull/6870
 - Remove `@@uncurried.swap`, which was used for internal tests. https://github.com/rescript-lang/rescript-compiler/pull/6875
+- Build the compiler libraries/tests in uncurried mode. https://github.com/rescript-lang/rescript-compiler/pull/6864
 
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