Try splitting a string for better readability

.gitlab-ci.yml

@@ -8,7 +8,8 @@ variables:
   BINARY_NAME: "freva-ingest"
   VERSION: "${CI_COMMIT_TAG}"
   LINUX_AMD64_ZIP: "${BINARY_NAME}-linux-amd64.zip"
-  PACKAGE_REGISTRY_URL: "${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/packages/generic/freva/${CI_PROJECT_NAME}/${PACKAGE_VERSION}"
+  PACKAGE_REGISTRY_URL: "${CI_API_V4_URL}/projects/${CI_PROJECT_ID}\
+    /packages/generic/freva/${CI_PROJECT_NAME}/${PACKAGE_VERSION}"
 
 default:
   image: rust:latest