fix: include OCI image manifest MIME type in Accept header when

checking for a digest update

Closes #132

Cargo.lock

@@ -376,7 +376,7 @@ dependencies = [
 
 [[package]]
 name = "cup"
-version = "3.4.1"
+version = "3.4.2"
 dependencies = [
  "bollard",
  "chrono",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cup"
-version = "3.4.1"
+version = "3.4.2"
 edition = "2021"
 
 [dependencies]

src/registry.rs

@@ -58,7 +58,7 @@ pub async fn get_latest_digest(
         protocol, &image.parts.registry, &image.parts.repository, &image.parts.tag
     );
     let authorization = to_bearer_string(&token);
-    let headers = [("Accept", Some("application/vnd.docker.distribution.manifest.list.v2+json, application/vnd.docker.distribution.manifest.v2+json, application/vnd.oci.image.index.v1+json")), ("Authorization", authorization.as_deref())];
+    let headers = [("Accept", Some("application/vnd.docker.distribution.manifest.list.v2+json, application/vnd.docker.distribution.manifest.v2+json, application/vnd.oci.image.index.v1+json, application/vnd.oci.image.manifest.v1+json")), ("Authorization", authorization.as_deref())];
 
     let response = client.head(&url, &headers).await;
     let time = start.elapsed().unwrap().as_millis() as u32;