add Linux Magazine as media sponsor to the 2023 sponsors page
Linux Magazine should be mentioned on the 2023 sponsors page just like on the 2022 page: https://akademy.kde.org/2022/sponsors/ (same content should be used).
Linux Magazine should be mentioned on the 2023 sponsors page just like on the 2022 page: https://akademy.kde.org/2022/sponsors/ (same content should be used).