Bump github.com/hashicorp/hcl/v2 from 2.19.1 to 2.20.1 #278

Job	Run time
compile	56s
Build board with vagrant	1m 28s
Build beaglebone-black/angstrom.json image	1m 9s
Build beaglebone-black/archlinuxarm.json image	1m 47s
Build beaglebone-black/debian.json image	1m 13s
Build beaglebone-black/ubuntu.pkr.hcl image	26s
Build odroid-u3/archlinuxarm.json image	1m 6s
Build odroid-xu4/archlinuxarm.json image	1m 36s
Build odroid-xu4/ubuntu.json image	1m 44s
Build parallella/archlinuxarm.json image	1m 44s
Build parallella/ubuntu.json image	1m 8s
Build raspberry-pi/archlinuxarm.json image	1m 8s
Build raspberry-pi/raspbian.json image	1m 30s
Build raspberry-pi/raspbian-resize.json image	1m 23s
Build raspberry-pi/raspios-lite-arm.json image	1m 7s
Build raspberry-pi-3/archlinuxarm.json image	1m 12s
Build raspberry-pi-3/raspios-lite-arm64.json image	54s
Build raspberry-pi-4/ubuntu_server_20.04_arm64.json image	8m 2s
Build raspberry-pi-4/ubuntu_server_20.04_arm64.pkr.hcl image	2m 15s
Build raspberry-pi-4/archlinuxarm.pkr.hcl image	1m 7s
Build rock-4b/debos-radxa.pkr.hcl image	1m 36s
Build wandboard/archlinuxarm.json image	1m 1s
	35m 32s

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