system/skopeo: Wrap README at 72 columns.

Signed-off-by: B. Watson <yalhcru@gmail.com>

system/skopeo/README

@@ -1,7 +1,7 @@
-skopeo is a command line utility that performs various operations on container
-images and image repositories. It can work with OCI images as well as the
-original Docker v2 images. It works with API V2 registries such as Docker
-registries, private registries, local directories and local OCI-layout
-directories.
+skopeo is a command line utility that performs various operations
+on container images and image repositories. It can work with OCI
+images as well as the original Docker v2 images. It works with API
+V2 registries such as Docker registries, private registries, local
+directories and local OCI-layout directories.
 
 `skopeo inspect docker://docker.io/vbatts/slackware`