Update Pretix to v2025.9.2 (#4499) #3336

Job	Run time
Check pretix needs building	10s
Check frontend needs building	13s
Check backend needs building	10s
Build pretix / Build pretix	2m 26s
Build backend	0s
Deploy backend	41s
Wait backend deployment	14s
Deploy frontend	34s
Build frontend	0s
Wait frontend deployment	9s
	4m 37s

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