chore(deps): bump dawidd6/action-download-artifact from 16 to 18 #117

Job	Run time
Setup old Shopware (5.2, 5.6, 5.7, 5.2.11-5.2.27) / Setup Shopware 5.2	3m 54s
Setup old Shopware (5.5, 7.1, 5.7, 5.5.0-5.5.10) / Setup Shopware 5.5	4m 50s
Setup old Shopware (5.3, 5.6, 5.7, 5.3.5-5.3.7) / Setup Shopware 5.3	4m 18s
Setup old Shopware (5.6, 7.2, 5.7, none) / Setup Shopware 5.6	4m 29s
Setup old Shopware (5.4, 5.6, 5.7, 5.4.6) / Setup Shopware 5.4	4m 8s
	21m 39s

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