ci: bump docker/setup-buildx-action from 2 to 3 #18

Job	Run time
prepare	23s
build (php-8-2-alpine, linux/amd64)	7m 41s
build (php-8-2-alpine, linux/386)	8m 0s
build (php-8-2-alpine, linux/arm/v6)	6h 0m 7s
build (php-8-2-alpine, linux/arm/v7)	19m 35s
build (php-8-2-alpine, linux/arm64)	17m 6s
build (php-8-2-bookworm, linux/amd64)	7m 12s
build (php-8-2-bookworm, linux/386)	9m 28s
build (php-8-2-bookworm, linux/arm/v6)	19m 39s
build (php-8-2-bookworm, linux/arm/v7)	18m 38s
build (php-8-2-bookworm, linux/arm64)	18m 12s
build (php-8-3-alpine, linux/amd64)	9m 46s
build (php-8-3-alpine, linux/386)	8m 55s
build (php-8-3-alpine, linux/arm/v6)	19m 51s
build (php-8-3-alpine, linux/arm/v7)	17m 38s
build (php-8-3-alpine, linux/arm64)	25m 19s
build (php-8-3-bookworm, linux/amd64)	13m 33s
build (php-8-3-bookworm, linux/386)	12m 25s
build (php-8-3-bookworm, linux/arm/v6)	28m 3s
build (php-8-3-bookworm, linux/arm/v7)	18m 22s
build (php-8-3-bookworm, linux/arm64)	25m 34s
push	0s
	11h 5m 27s

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