docs: Update changelog

CHANGELOG.md

@@ -18,6 +18,7 @@ _gated behind `unstable-v4`_
 - Leading dashes in `Arg::long` are no longer allowed (#3691)
 - Verify `required` is not used with conditional required settings (#3660)
 - Disallow more `value_names` than `number_of_values` (#2695)
+- Don't correct argument id in `default_value_ifs_os`(#3815)
 - *(assert)* Always enforce that version is specified when the `ArgAction::Version` is used
 - *(assert)* Add missing `#[track_caller]`s to make it easier to debug asserts
 - *(help)* Use `Command::display_name` in the help title rather than `Command::bin_name`