Update BUILDER_IMAGE_REVISION to v5.12.0

v5.11.0 updates Node.js from v18.17 to v20.12:
https://gitlab.com/gitlab-org/gitlab-omnibus-builder/-/merge_requests/337

Changelog: changed

Author: stanhu

.gitlab-ci.yml

@@ -37,7 +37,7 @@ variables:
   # To be used for images that exist only on dev.gitlab.org
   DEV_BUILDER_IMAGE_REGISTRY: 'dev.gitlab.org:5005/cookbooks/gitlab-omnibus-builder'
   PUBLIC_BUILDER_IMAGE_REGISTRY: "registry.gitlab.com/gitlab-org/gitlab-omnibus-builder"
-  BUILDER_IMAGE_REVISION: "5.10.0"
+  BUILDER_IMAGE_REVISION: "5.12.0"
   # The registry to pull the assets image from
   ASSET_REGISTRY: "${CI_REGISTRY}"
   ASSET_SYNC_EXISTING_REMOTE_FILES: "keep"