fix(registry): unswallow error

Signed-off-by: Hidde Beydals <[email protected]>
(cherry picked from commit da3c666)

pkg/registry/client.go

@@ -103,7 +103,7 @@ func NewClient(options ...ClientOption) (*Client, error) {
 		if ok {
 			username, password, err := dockerClient.Credential(ref.Registry)
 			if err != nil {
-				return nil, errors.New("unable to retrieve credentials")
+				return nil, fmt.Errorf("unable to retrieve credentials: %w", err)
 			}
 			authHeader(username, password, &headers)
 		}