Re-add CHANGELOG.md entry for #2197 (#2638)

Using `git log -p apache-polaris-1.1.0-incubating..553cb06 -- CHANGELOG.md` to find changes missed in the previous CHANGELOG update (#2635)

Author: dimas-b

CHANGELOG.md

@@ -38,6 +38,8 @@ request adding CHANGELOG notes for breaking (!) changes and possibly other secti
 
 ### New Features
 
+- Added a Management API endpoint to reset principal credentials, controlled by the `ENABLE_CREDENTIAL_RESET` (default: true) feature flag.
+
 ### Changes
 
 ### Deprecations