Update renovate bot to point to new workspace-tools repo

MR: chore: Update upstream for gitlab-workspaces-tools (gitlab-org/frontend/renovate-gitlab-bot!912 - merged)

Description

As part of IDE group and Remote Development Category renam... (#472761), we are moving workspace-tools from https://gitlab.com/gitlab-org/remote-development/gitlab-workspaces-tools to https://gitlab.com/gitlab-org/workspaces/gitlab-workspaces-tools. We must point the renovate bot to open MRs to the new repo.

Acceptance Criteria

• Renovate bot uses the new repo location as upstream when opening MRs
• check off task on: IDE group and Remote Development Category renam... (#472761)