Split script line to improve readability

This patch just adjusts the arrangement of the lines to allow easier
readability. The line is collabsed on execution.

Reference:
https://docs.gitlab.com/ee/ci/yaml/script.html

gitlab-ci-template.yml

@@ -24,7 +24,14 @@ container-build:
     - export VCS_URL=$CI_PROJECT_URL
   script:
     - si-fix "${CI_REGISTRY_BUILD_DOCKERFILE:-./Dockerfile}"
-    - podman build --pull --label "org.opencontainers.image.source=$CI_PROJECT_URL" --label "org.opencontainers.image.revision=$CI_COMMIT_SHA" --label "org.opencontainers.image.created=$(date --rfc-3339 ns)" --label "org.opencontainers.image.title=$CI_PROJECT_TITLE" $CI_REGISTRY_BUILD_ARGS -t "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA" .
+    - podman build --pull
+      --label "org.opencontainers.image.source=$CI_PROJECT_URL"
+      --label "org.opencontainers.image.revision=$CI_COMMIT_SHA"
+      --label "org.opencontainers.image.created=$(date --rfc-3339 ns)"
+      --label "org.opencontainers.image.title=$CI_PROJECT_TITLE"
+      $CI_REGISTRY_BUILD_ARGS
+      -t "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA"
+      .
     - podman push "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-$CI_COMMIT_SHORT_SHA"
 
 container-tagging: