github: Switch to minio deb and pin working version #400

Job	Run time
System (1.20.x, cluster, dir)	4m 20s
Documentation	4m 21s
Client (1.20.x, ubuntu-latest)	28s
Code	4m 21s
System (1.20.x, cluster, btrfs)	4m 21s
Client (1.20.x, macos-latest)	54s
System (1.20.x, cluster, lvm)	4m 18s
System (1.20.x, cluster, zfs)	4m 19s
System (1.20.x, cluster, ceph)	4m 20s
Client (1.20.x, windows-latest)	2m 25s
System (1.20.x, cluster, random)	4m 19s
System (1.20.x, standalone, dir)	4m 19s
System (1.20.x, standalone, btrfs)	4m 20s
System (1.20.x, standalone, lvm)	4m 20s
System (1.20.x, standalone, zfs)	4m 21s
System (1.20.x, standalone, ceph)	4m 17s
System (1.20.x, standalone, random)	4m 20s
System (stable, cluster, dir)	4m 23s
System (stable, standalone, dir)	4m 21s
System (tip, cluster, dir)	1m 10s
System (tip, standalone, dir)	1m 10s
	1h 15m 27s

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