examples/archlinux.yaml: use more reliable image URL

Signed-off-by: Akihiro Suda <[email protected]>

Author: AkihiroSuda

examples/archlinux.yaml

@@ -1,7 +1,8 @@
 # This example requires Lima v0.5.0 or later
 arch: "x86_64"
 images:
-  - location: "https://gitlab.archlinux.org/archlinux/arch-boxes/-/jobs/27546/artifacts/raw/output/Arch-Linux-x86_64-cloudimg-20210630.27546.qcow2"
+  # NOTE: the image is periodically rotated, if you face 404, see https://mirror.pkgbuild.com/images/ to find the latest image.
+  - location: "https://mirror.pkgbuild.com/images/v20210619.26314/Arch-Linux-x86_64-cloudimg-20210619.26314.qcow2"
     arch: "x86_64"
 mounts:
   - location: "~"