Add change log

Author: unandyala

packages/pwa-kit-runtime/CHANGELOG.md

@@ -1,5 +1,6 @@
 ## [Unreleased]
 - Add HttpOnly session cookies for SLAS private client proxy [#3680](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3680)
+- Handle logout when HttpOnly session cookies is enabled  [#3699](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3699)
 
 ## v3.17.0-dev
 - Add Node 24 support. Migrate deprecated Node.js `url.parse()` and `url.format()` to the WHATWG `URL` [#3652](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3652)