Modify the test's config type

Signed-off-by: zhouhao <[email protected]>

Author: zhouhao

schema/manifest_backwards_compatibility_test.go

@@ -136,14 +136,14 @@ func TestBackwardsCompatibilityManifest(t *testing.T) {
 		//
 		// curl -L -H "Authorization: Bearer ..." -H \
 		// "Accept: application/vnd.docker.distribution.manifest.v2+json" \
-		// https://registry-1.docker.io/v2/library/docker/manifests/sha256:888206c77cd2811ec47e752ba291e5b7734e3ef137dfd222daadaca39a9f17bc
+		// https://registry-1.docker.io/v2/library/docker/manifests/sha256:d901d5244c94db8151415bf3a1d3a0b10e7468e4997786b01c287cbcbaeca446
 		{
-			digest: "sha256:888206c77cd2811ec47e752ba291e5b7734e3ef137dfd222daadaca39a9f17bc",
+			digest: "sha256:d901d5244c94db8151415bf3a1d3a0b10e7468e4997786b01c287cbcbaeca446",
 			manifest: `{
    "schemaVersion": 2,
    "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
    "config": {
-      "mediaType": "application/octet-stream",
+      "mediaType": "application/vnd.docker.container.image.v1+json",
       "size": 3210,
       "digest": "sha256:5359a4f250650c20227055957e353e8f8a74152f35fe36f00b6b1f9fc19c8861"
    },