Capitalize keyword in alpine dockerfile (#633) #766

Job	Run time
cryptography-runner-rhel8	1m 32s
cryptography-runner-rhel8-fips	1m 22s
cryptography-runner-centos-stream9	1m 45s
cryptography-runner-centos-stream9-fips	1m 43s
cryptography-runner-fedora	1m 24s
cryptography-runner-alpine	2m 34s
cryptography-runner-bullseye	1m 47s
cryptography-runner-bookworm	1m 40s
cryptography-runner-trixie	1m 26s
cryptography-runner-sid	2m 8s
cryptography-runner-ubuntu-focal	1m 31s
cryptography-runner-ubuntu-jammy	1m 28s
cryptography-runner-ubuntu-noble	1m 26s
cryptography-runner-ubuntu-rolling	1m 33s
cryptography-manylinux2014:x86_64	2m 28s
cryptography-manylinux_2_28:x86_64	2m 39s
cryptography-musllinux_1_1:x86_64	3m 7s
cryptography-musllinux_1_2:x86_64	3m 12s
cryptography-manylinux2014_aarch64	5m 54s
cryptography-manylinux_2_28:aarch64	38s
cryptography-musllinux_1_1:aarch64	31s
cryptography-musllinux_1_2:aarch64	4m 37s
cryptography-runner-ubuntu-rolling:aarch64	22s
cryptography-runner-alpine:aarch64	3m 19s
	50m 6s

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