Fix `incus restart` description #1396

Job	Run time
Code	6m 40s
Code	6m 40s
Client (1.21.x, ubuntu-latest)	22s
Client (1.21.x, ubuntu-latest)	22s
Documentation	5m 33s
Documentation	6m 16s
Client (1.21.x, macos-latest)	44s
Client (1.21.x, macos-latest)	44s
System (1.21.x, cluster, dir)	12m 29s
System (1.21.x, cluster, dir)	12m 29s
Client (1.21.x, windows-latest)	2m 3s
Client (1.21.x, windows-latest)	2m 3s
System (1.21.x, cluster, btrfs)	11m 33s
System (1.21.x, cluster, btrfs)	11m 33s
System (1.21.x, cluster, lvm)	13m 11s
System (1.21.x, cluster, lvm)	13m 11s
System (1.21.x, cluster, zfs)	12m 33s
System (1.21.x, cluster, zfs)	12m 33s
System (1.21.x, cluster, ceph)	15m 13s
System (1.21.x, cluster, ceph)	15m 13s
System (1.21.x, cluster, random)	11m 20s
System (1.21.x, cluster, random)	11m 20s
System (1.21.x, standalone, dir)	21m 36s
System (1.21.x, standalone, dir)	21m 36s
System (1.21.x, standalone, btrfs)	21m 46s
System (1.21.x, standalone, btrfs)	21m 46s
System (1.21.x, standalone, lvm)	37m 53s
System (1.21.x, standalone, lvm)	37m 53s
System (1.21.x, standalone, zfs)	38m 23s
System (1.21.x, standalone, zfs)	38m 23s
System (1.21.x, standalone, ceph)	1h 12m 30s
System (1.21.x, standalone, ceph)	1h 12m 30s
System (1.21.x, standalone, random)	21m 46s
System (1.21.x, standalone, random)	21m 46s
System (stable, cluster, dir)	11m 15s
System (stable, cluster, dir)	11m 15s
System (stable, standalone, dir)	20m 13s
System (stable, standalone, dir)	20m 13s
System (tip, cluster, dir)	12m 16s
System (tip, cluster, dir)	12m 16s
System (tip, standalone, dir)	22m 24s
System (tip, standalone, dir)	22m 24s
	12h 24m 9s

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