Update WordPress.org screenshots

[remcotolsma]

Thanks for your advice. BTW I noticed a typo in your plug in the Settings page see this screenshot:

https://ps.w.org/pronamic-ideal/assets/screenshot-9.png?rev=2163687

It should be “Separator” not “Seperator”.

Source: https://wordpress.org/support/topic/questions-regarding-implementing-pronamic-pay-paid-version/#post-17046785

https://github.com/pronamic/wp-pronamic-pay/blob/2abb815ae98f2c05e5d17cabe2de601396e8955f/.wordpress-org/screenshot-9.png