Flatpak / Flathub release #251

Job	Run time
Test Processing	4m 17s
(macos/x64) Create Processing Build	8m 5s
(macos/aarch64) Create Processing Build	4m 6s
(windows/x64) Create Processing Build	6m 5s
(linux/aarch64) Create Processing Build	8m 9s
(linux/x64) Create Processing Build	10m 38s
	41m 20s

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