update qemu to 8.1.4 #530

Job	Run time
prepare (mainline)	6m 36s
prepare (buildkit)	7m 3s
prepare (desktop)	6m 47s
validate (./hack/lint)	30s
e2e (mainline, pip-youtube-dl, linux/arm/v7)	1m 24s
validate (./hack/validate-vendor)	15s
e2e (mainline, webpack, linux/arm/v7)	1m 52s
e2e (desktop, pip-youtube-dl, linux/arm/v7)	1m 8s
validate (./hack/install-and-test)	33s
test (mainline)	2m 44s
e2e (desktop, webpack, linux/arm/v7)	1m 54s
test (buildkit)	28s
e2e (mainline, ejabberd, linux/arm64)	13m 31s
test (desktop)	9s
e2e (desktop, tini, linux/arm64, true)	38s
build (mainline)	26m 6s
build (buildkit)	24m 48s
build (desktop)	25m 50s
	2h 2m 16s

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