Update to ostree-ext 0.15

Only one tiny change required thankfully for this one!

This drops out duplicate versions of oci-spec from our
lockfile too which is nice.

Signed-off-by: Colin Walters <walters@verbum.org>

Author: cgwalters

Cargo.lock

@@ -19,7 +19,7 @@ anstyle = "1.0.6"
 anyhow = { workspace = true }
 bootc-utils = { path = "../utils" }
 camino = { workspace = true, features = ["serde1"] }
-ostree-ext = { version = "0.14.0" }
+ostree-ext = { version = "0.15.0" }
 chrono = { workspace = true, features = ["serde"] }
 clap = { workspace = true, features = ["derive","cargo"] }
 clap_mangen = { version = "0.2.20", optional = true }

lib/Cargo.toml

@@ -178,7 +178,7 @@ async fn handle_layer_progress_print(
                         byte_bar.reset_eta();
                         byte_bar.set_length(layer_size);
                         let layer_type = prefix_of_progress(&l);
-                        let short_digest = &layer.digest()[0..21];
+                        let short_digest = &layer.digest().digest()[0..21];
                         byte_bar.set_message(format!("{layer_type} {short_digest}"));
                     } else {
                         byte_bar.set_position(layer_size);