package/php: bump version to 8.0.18
Changelog: https://www.php.net/ChangeLog-8.php#8.0.18
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 6d97f3e2e64707d9d4589fdf5dae8252143dc31f)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>