Update Dockerfile (#1625) #89

Job	Run time
php (8.1, false)	2m 31s
php (8.2, false)	2m 15s
php (8.5, true, --ignore-platform-reqs)	13m 3s
php (8.4, false, --ignore-platform-reqs)	1m 51s
php (8.3, false)	2m 8s
packages	0s
	21m 48s

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