Update CHANGELOG.md

Per Larsen · thedataking · commit d020ef1b70fa · 2025-08-21T03:49:01.000-07:00
Note addition of #3265
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -227,6 +227,7 @@
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 # Unreleased
 ## Added
+ * Add option in CLI to use rustified repr-C enums (--rustified-repr-c-enum, #3265).
 ## Changed
 ## Removed
 ## Fixed
