Fix changelog entry for release

Author: jterapin

gems/aws-sdk-core/CHANGELOG.md

@@ -3,7 +3,7 @@ Unreleased Changes
 
 * Issue - Fix `request_checksum_calculation` `when_required` mode to only calculate checksums when explicitly provided by user.
 
-* Issue - Add `CREDENTIALS_CODE` metric for `static_profile_` prefixed methods in default credential chain.
+* Feature - Add `CREDENTIALS_CODE` metric for `static_profile_` prefixed methods in default credential chain.
 
 3.233.0 (2025-09-23)
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