fix Additional

Author: LamentXU123

ext/zip/php_zip.h

@@ -36,7 +36,7 @@ extern zend_module_entry zip_module_entry;
 #define ZIP_LENGTH_TO_END 0
 #endif
 
-/* Additionnal flags not from libzip */
+/* Additional flags not from libzip */
 #define ZIP_FL_OPEN_FILE_NOW (1u<<30)
 
 #define PHP_ZIP_VERSION "1.22.8"