Commit 17ee5f6c576 for php.net

commit 17ee5f6c576d9544c0138c24ba08f58515d9f541
Merge: b74bc273c4f 9002df8a413
Author: Weilin Du <weilindu@php.net>
Date:   Tue Aug 18 22:58:20 2026 +0800

    Merge branch 'PHP-8.4' into PHP-8.5

    * PHP-8.4:
      Stop grapheme_str_split from using UBRK_DONE as a byte index (#23349)