Fixes ICS download in non-public event content (#6497) #19762

Job	Run time
Core Basic (18.x)	6m 41s
Core Basic - Plone 5 (18.x)	7m 21s
Core Basic (20.x)	6m 50s
Core Blocks (18.x)	7m 14s
Core Blocks (20.x)	7m 38s
Core Blocks - Listing (18.x)	5m 39s
Core Content (18.x)	3m 36s
Core Blocks - Listing (20.x)	5m 28s
Core Control Panels (18.x)	4m 23s
Coresandbox (18.x)	4m 40s
Core Content (20.x)	3m 26s
Core Control Panels (20.x)	4m 10s
Core Volto Slate (18.x)	7m 59s
Core Volto Slate (20.x)	7m 45s
Project Generator (18.x)	5m 12s
Guillotina (18.x)	3m 54s
Project Generator (20.x)	5m 11s
Multilingual (18.x)	3m 43s
Multilingual in Seamless Mode (18.x)	3m 54s
Seamless Mode (18.x)	6m 49s
Working Copy (18.x)	3m 31s
	1h 55m 4s

Provide feedback