Flatpak / Flathub release #250

Job	Run time
Test Processing	4m 7s
(linux/aarch64) Create Processing Build	8m 5s
(macos/x64) Create Processing Build	14m 8s
(macos/aarch64) Create Processing Build	4m 6s
(linux/x64) Create Processing Build	11m 2s
(windows/x64) Create Processing Build	6m 7s
	47m 35s

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