Update instructions for updating go version

Discovered while investigating an issue that the process for omnibus
has changed.

doc/development/go_guide/index.md

@@ -449,11 +449,10 @@ changes between minor versions can expose bugs or cause problems in our projects
 Once you've picked a new Go version to use, the steps to update Omnibus and CNG
 are:
 
-- [Create a merge request in the CNG project](https://gitlab.com/gitlab-org/build/CNG/edit/master/ci_files/variables.yml?branch_name=update-go-version),
+- [Create a merge request in the CNG project](https://gitlab.com/gitlab-org/build/CNG/-/edit/master/ci_files/variables.yml?branch_name=update-go-version),
   updating the `GO_VERSION` in `ci_files/variables.yml`.
-- Create a merge request in the [`gitlab-omnibus-builder` project](https://gitlab.com/gitlab-org/gitlab-omnibus-builder),
-  updating every file in the `docker/` directory so the `GO_VERSION` is set
-  appropriately. [Here's an example](https://gitlab.com/gitlab-org/gitlab-omnibus-builder/-/merge_requests/125/diffs).
+- [Create a merge request in the `gitlab-omnibus-builder` project](https://gitlab.com/gitlab-org/gitlab-omnibus-builder/-/edit/master/docker/VERSIONS?branch_name=update-go-version),
+  updating the `GO_VERSION` in `docker/VERSIONS`.
 - Tag a new release of `gitlab-omnibus-builder` containing the change.
 - [Create a merge request in the `omnibus-gitlab` project](https://gitlab.com/gitlab-org/omnibus-gitlab/edit/master/.gitlab-ci.yml?branch_name=update-gitlab-omnibus-builder-version),
   updating the `BUILDER_IMAGE_REVISION` to match the newly-created tag.