Update to c/image main branch

> go get github.com/containers/image/v5@main
> make vendor

... to make sure that we don't regress against Skopeo 1.9.3.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

vendor/github.com/letsencrypt/boulder/goodkey/blocked.go

@@ -6,7 +6,7 @@ import (
 	"encoding/base64"
 	"encoding/hex"
 	"errors"
-	"io/ioutil"
+	"os"
 
 	"github.com/letsencrypt/boulder/core"
 
@@ -42,16 +42,14 @@ func (b blockedKeys) blocked(key crypto.PublicKey) (bool, error) {
 // SHA256 hashes of SubjectPublicKeyInfo's in the input YAML file
 // with the expected format:
 //
-// ```
-// blocked:
-//   - cuwGhNNI6nfob5aqY90e7BleU6l7rfxku4X3UTJ3Z7M=
-//   <snipped>
-//   - Qebc1V3SkX3izkYRGNJilm9Bcuvf0oox4U2Rn+b4JOE=
-// ```
+//	blocked:
+//	  - cuwGhNNI6nfob5aqY90e7BleU6l7rfxku4X3UTJ3Z7M=
+//	  <snipped>
+//	  - Qebc1V3SkX3izkYRGNJilm9Bcuvf0oox4U2Rn+b4JOE=
 //
 // If no hashes are found in the input YAML an error is returned.
 func loadBlockedKeysList(filename string) (*blockedKeys, error) {
-	yamlBytes, err := ioutil.ReadFile(filename)
+	yamlBytes, err := os.ReadFile(filename)
 	if err != nil {
 		return nil, err
 	}