Yes you can renew your PR Card at the same time as you change your name on your PR Card.
When you change your name, your middle name does not become your maiden name. Your maiden name will always be your birth name. You could make your maiden name your new middle name, as part of your name change, or you could have a hybrid last name of your maiden name and your husband’s last name, but in neither case does your middle name become your maiden name.
If there is a discrepancy between your passport and your PR Card, that could be a problem, though middle names are less significant. You should make sure all your IDs have the same name on them.