templates: update openSUSE to 15.6

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

Author: AkihiroSuda

examples/opensuse.yaml

@@ -1,9 +1,9 @@
 # This template requires Lima v0.7.0 or later
 images:
 # Hint: run `limactl prune` to invalidate the "Current" cache
-- location: "https://download.opensuse.org/distribution/leap/15.5/appliances/openSUSE-Leap-15.5-Minimal-VM.x86_64-Cloud.qcow2"
+- location: "https://download.opensuse.org/distribution/leap/15.6/appliances/openSUSE-Leap-15.6-Minimal-VM.x86_64-Cloud.qcow2"
   arch: "x86_64"
-- location: "https://download.opensuse.org/distribution/leap/15.5/appliances/openSUSE-Leap-15.5-Minimal-VM.aarch64-Cloud.qcow2"
+- location: "https://download.opensuse.org/distribution/leap/15.6/appliances/openSUSE-Leap-15.6-Minimal-VM.aarch64-Cloud.qcow2"
   arch: "aarch64"
 mounts:
 - location: "~"