[skip ci] make description clearer

Author: LamentXU123

UPGRADING.INTERNALS

@@ -64,7 +64,8 @@ PHP 8.6 INTERNALS UPGRADE NOTES
     zend_enum_RoundingMode parameter.
   . Added Z_PARAM_ENUM().
   . Added zend_enum_fetch_case_id().
-  . Added zend_bin2hex(), zend_bin2hex_upper() and zend_bin2hex_str().
+  . Added zend_bin2hex(), zend_bin2hex_upper() and zend_bin2hex_str() as helper
+    functions to remove dependencies on /ext/hash in various extensions.
   . ZEND_INI_GET_ADDR() is now a void* pointer instead of a char* pointer. This
     more correctly represents the generic nature of the returned pointer and
     allows to remove explicit casts, but possibly breaks pointer arithmetic