fix new helm push syntax

.gitlab-ci.yml

@@ -153,7 +153,7 @@ upload:
     .set-helm-version
   script:
     - echo "${CI_REGISTRY_PASSWORD}" | helm registry login "${CI_REGISTRY_IMAGE}" -u "${CI_REGISTRY_USER}" --password-stdin
-    - helm push "${CI_PROJECT_DIR}" "${CI_REGISTRY_IMAGE}/shibboleth-sp:${CI_COMMIT_TAG}"
+    - helm push "${CI_PROJECT_DIR}" "oci://${CI_REGISTRY_IMAGE}/shibboleth-sp:${CI_COMMIT_TAG}"
 
 release:
   image: registry.gitlab.com/gitlab-org/release-cli:latest