ci: Update GitLab Helm chart version to 5.4.1

Signed-off-by: Rémy Coutable <remy@rymai.me>

.gitlab/ci/review-apps/main.gitlab-ci.yml

@@ -38,7 +38,7 @@ review-build-cng:
   variables:
     HOST_SUFFIX: "${CI_ENVIRONMENT_SLUG}"
     DOMAIN: "-${CI_ENVIRONMENT_SLUG}.${REVIEW_APPS_DOMAIN}"
-    GITLAB_HELM_CHART_REF: "v5.2.1"
+    GITLAB_HELM_CHART_REF: "v5.4.1"
   environment:
     name: review/${CI_COMMIT_REF_SLUG}${FREQUENCY}
     url: https://gitlab-${CI_ENVIRONMENT_SLUG}.${REVIEW_APPS_DOMAIN}