composefs/state: Fix imgref format in origin file

On `UpdateAction::UpdateOrigin` the origin for the container image used
was not properly formatted. Fixed it

Signed-off-by: Pragyan Poudyal <pragyanpoudyal41999@gmail.com>

Author: Johan-Liebert1

crates/lib/src/bootc_composefs/state.rs

@@ -162,7 +162,10 @@ pub(crate) fn update_target_imgref_in_origin(
         "origin",
         &[(
             ORIGIN_CONTAINER,
-            &format!("ostree-unverified-image:{imgref}"),
+            &format!(
+                "ostree-unverified-image:{}",
+                get_imgref(&imgref.transport, &imgref.image)
+            ),
         )],
     )
 }