Update how-to.md #17535

Job	Run time
Core Basic (18.x)	6m 9s
Core Blocks (18.x)	8m 47s
Core Blocks - Listing (18.x)	5m 19s
Core Blocks (20.x)	8m 13s
Core Basic (20.x)	6m 48s
Core Content (18.x)	3m 21s
Core Blocks - Listing (20.x)	5m 7s
Core Content (20.x)	2m 55s
Core Control Panels (18.x)	5m 15s
Core Volto Slate (18.x)	7m 10s
Core Control Panels (20.x)	3m 59s
Core Volto Slate (20.x)	7m 0s
Core Basic - Plone 5 (18.x)	6m 26s
Coresandbox (18.x)	6m 4s
Deployment Mode (18.x)	6m 19s
Project Generator (18.x)	6m 43s
Project Generator (20.x)	6m 42s
Multilingual (18.x)	3m 11s
Multilingual in Deployment Mode (18.x)	3m 38s
Working Copy (18.x)	3m 9s
	1h 52m 15s

Provide feedback