build

ci: update alpine to 3.21 #548

Job	Run time
validate	11s
test (alpine:3.17, alpine, false)	4m 4s
test (alpine:3.18, alpine, false)	4m 25s
test (alpine:3.19, alpine, false)	4m 11s
test (alpine:3.20, alpine, false)	4m 32s
test (alpine:3.21, alpine, false)	4m 42s
test (alpine:edge, alpine, true)	4m 34s
test (debian:bullseye-backports, debian, false)	4m 31s
test (debian:bookworm, debian, false)	12m 19s
test (debian:bookworm-backports, debian, false)	11m 34s
test (debian:trixie, debian, false)	13m 2s
test (debian:sid, debian, true)	5m 0s
test (ubuntu:20.04, debian, false)	11m 22s
test (ubuntu:22.04, debian, false)	13m 26s
test (ubuntu:24.04, debian, false)	14m 44s
test (redhat/ubi8, rhel, false)	47s
test (fedora:38, rhel, false)	1m 47s
test (fedora:39, rhel, false)	1m 5s
test (fedora:40, rhel, false)	44s
test (fedora:41, rhel, false)	39s
test (centos:7, rhel, false)	44s
test (rockylinux/rockylinux:8, rhel, false)	45s
test (rockylinux/rockylinux:9, rhel, false)	49s
test (oraclelinux:8, rhel, false)	1m 15s
test (oraclelinux:9, rhel, false)	1m 1s
build	1s
	2h 2m 14s

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