fix: restore mergerfs RPM install #516

Job	Run time
build-stable / Get Workflow Info	1s
build-stable / Get Stream Info	8s
build-stable / ucore (-minimal, -nvidia, -zfs)	3m 44s
build-stable / fedora-coreos (-nvidia, -zfs)	2m 52s
build-stable / ucore (-minimal, -nvidia)	3m 24s
build-stable / fedora-coreos (-nvidia)	3m 22s
build-stable / ucore (-minimal, -zfs)	3m 8s
build-stable / fedora-coreos (-zfs)	2m 29s
build-stable / ucore (-minimal)	2m 36s
build-stable / ucore (-nvidia, -zfs)	3m 36s
build-stable / ucore (-nvidia)	3m 54s
build-stable / ucore (-zfs)	3m 16s
build-stable / ucore	3m 22s
build-stable / ucore (-hci, -nvidia, -zfs)	5m 43s
build-stable / ucore (-hci, -nvidia)	5m 10s
build-stable / ucore (-hci, -zfs)	4m 57s
build-stable / ucore (-hci)	5m 0s
build-stable / Check all successful	1s
	56m 43s

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