ci: only build loong64 #23

Job	Run time
check	9s
check	9s
compile	2m 33s
compile	11m 54s
build	1s
reh_linux	1s
reh_alpine	1s
deb-rpm-repo-hook	1s
deb-rpm-repo-hook	0s
snap	1s
snap	0s
aur	1s
aur	0s
reh_linux (LOONG64, loong64, loong64)	9m 43s
reh_alpine (x64, x64)	5m 6s
build (LOONG64, loong64, loong64, ghcr.io/darkyzhou/vscodium-linux-build-agent:trixie-loong64)	5m 29s
reh_alpine (arm64, arm64)	9m 43s
	44m 52s

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