Enable back the webpki-roots feature #75

Job	Run time
Build the image (linux/ppc64le, ubuntu-22.04, true)	51m 38s
Build the image (linux/amd64, ubuntu-22.04, false)	6m 2s
Build the image (linux/s390x, ubuntu-22.04, true)	1h 26m 16s
Build the image (linux/riscv64, ubuntu-22.04, true)	1h 5m 52s
Build the image (linux/386, ubuntu-22.04, true)	6m 48s
Build the image (linux/arm64/v8, ubuntu-22.04-arm, false)	5m 45s
Build the image (linux/arm/v7, ubuntu-22.04-arm, true)	8m 33s
Build the image (linux/arm/v6, ubuntu-22.04, true)	58m 11s
	4h 49m 5s

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