Bump docker/bake-action from 4 to 5 #612

Job	Run time
prepare (mainline)	32s
prepare (buildkit)	7s
prepare (desktop)	26s
validate (./hack/lint)	37s
validate (./hack/validate-vendor)	19s
validate (./hack/install-and-test)	58s
e2e (mainline, pip-youtube-dl, linux/arm/v7)	1m 11s
test (mainline)	3m 26s
e2e (mainline, webpack, linux/arm/v7)	2m 10s
test (buildkit)	33s
e2e (desktop, pip-youtube-dl, linux/arm/v7)	1m 25s
test (desktop)	7s
e2e (desktop, webpack, linux/arm/v7)	2m 3s
e2e (mainline, ejabberd, linux/arm64)	13m 57s
e2e (desktop, tini, linux/arm64, --rm)	33s
e2e (desktop, postgis, linux/arm64, -d --name postgis, postgis, UTC [1] LOG: database system is ...	44s
build (mainline)	1m 42s
build (buildkit)	16s
build (desktop)	1m 54s
	33m 0s

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