build

ci: update alpine to 3.21 #549

Job	Run time
validate	17s
test (alpine:3.17, alpine, false)	3m 55s
test (alpine:3.18, alpine, false)	4m 6s
test (alpine:3.19, alpine, false)	4m 14s
test (alpine:3.20, alpine, false)	4m 10s
test (alpine:3.21, alpine, false)	4m 6s
test (alpine:edge, alpine, true)	4m 19s
test (debian:bullseye-backports, debian, false)	4m 7s
test (debian:bookworm, debian, false)	4m 49s
test (debian:bookworm-backports, debian, false)	4m 46s
test (debian:trixie, debian, false)	3m 49s
test (debian:sid, debian, true)	4m 11s
test (ubuntu:20.04, debian, false)	13s
test (ubuntu:22.04, debian, false)	13s
test (ubuntu:24.04, debian, false)	7s
test (redhat/ubi8, rhel, false)	31s
test (fedora:38, rhel, false)	58s
test (fedora:39, rhel, false)	57s
test (fedora:40, rhel, false)	47s
test (fedora:41, rhel, false)	44s
test (centos:7, rhel, false)	43s
test (rockylinux/rockylinux:8, rhel, false)	21s
test (rockylinux/rockylinux:9, rhel, false)	15s
test (oraclelinux:8, rhel, false)	42s
test (oraclelinux:9, rhel, false)	38s
build	1s
	53m 59s

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