#OpenPrinting News May: #OpenPrinting Summit/#PWG Meeting 2023, #LinuxAppSummit #LAS2023 in Brno, #GUADEC #GUADEC2023 in Riga, #Ubuntu #UbuntuSummit 2023 in Riga, #GSoC 2023, #CUPS 3.x only end-2024, Print GUI testing, CPDB in print dialogs, #security bugs with #GitHub #tutorial https://openprinting.github.io/OpenPrinting-News-May-2023/