Update about-5.7.md

removing 1 item

Author: ohad-perets

content/nap-waf/v5/releases/about-5.7.md

@@ -27,7 +27,6 @@ June 30th, 2025
 - 12400 - Cookie attributes are not added to a TS cookie when there is more than one TS cookie
 - 12498 - Undefined behavior when using huge XFF 
 - 12731 - Multiple clean_resp_reset internal error messages in logs when loading NAP
-- 12551 - Changing the vendor/maintainer email in all packages from plus-support to nginx-packaging
 
 ## Supported packages