ci: update bake-action to v6 #272

Job	Run time
ld-targets	2s
binutils-targets	2s
ld64	24s
utils-lipo	33s
utils-sigtool	20s
ld (ld-linux-386-static-tgz)	25s
ld (ld-linux-amd64-static-tgz)	18s
ld (ld-linux-arm64-static-tgz)	30s
ld (ld-linux-armv6-static-tgz)	22s
ld (ld-linux-armv7-static-tgz)	26s
ld (ld-linux-ppc64le-static-tgz)	20s
ld (ld-linux-riscv64-static-tgz)	27s
ld (ld-linux-s390x-static-tgz)	17s
ld (ld-windows-386-static-tgz)	21s
ld (ld-windows-amd64-static-tgz)	36s
binutils (binutils-linux-386-alpine)	36s
binutils (binutils-linux-amd64-alpine)	29s
binutils (binutils-linux-arm64-alpine)	33s
binutils (binutils-linux-armv6-alpine)	21s
binutils (binutils-linux-armv7-alpine)	28s
binutils (binutils-linux-ppc64le-alpine)	23s
binutils (binutils-linux-riscv64-alpine)	29s
binutils (binutils-linux-s390x-alpine)	21s
binutils (binutils-windows-386-alpine)	22s
binutils (binutils-windows-amd64-alpine)	22s
release	0s
	9m 47s

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