Clarify docs on running rake task with CSV

Add details on how to push up a csv file and run rake tasks from the
command line.

source/manual/government-changes.html.md.erb

@@ -145,10 +145,17 @@ order):
 | `New lead organisations` | The slugs of the new leading organisations (separated by a comma). These will replace any existing organisations. |
 | `New supporting organisations` | The slugs of the new supporting organisations (separated by a comma). These will replace any existing organisations. |
 
+To run on anything other than a local environment, the CSV needs to be added manually to the /tmp directory using scp-push.
+```
+$ gds govuk connect scp-push --environment [integration|staging|integration] name-of-machine[:1|:2|:3] path/to/file.csv /tmp/
+```
+The rake task can then be run from the command line following [these instructions][running-rake-tasks-on-the-command-line].
+
 There is a similar [Rake task to change the organisations for Manuals][manuals-bulk-update-organisation].
 A data migration is required to change the organisations for (Mainstream) Publisher documents. This is an example PR: [Migrate Publisher docs][publisher-bulk-update-organisation-example]
 
 [whitehall-bulk-update-organisation]: https://github.com/alphagov/whitehall/blob/main/lib/tasks/data_hygiene.rake
+[running-rake-tasks-on-the-command-line]: https://docs.publishing.service.gov.uk/manual/running-rake-tasks.html#run-rake-tasks-from-the-command-line
 [manuals-bulk-update-organisation]: https://github.com/alphagov/manuals-publisher/blob/main/lib/tasks/update_manual_organisation.rake
 [publisher-bulk-update-organisation-example]: https://github.com/alphagov/publishing-api/pull/1981