Move Service Desk category to SEG from Monitor:Respond group

Why is this change being made?

In August 2023 the Monitor:Respond group was disbanded and team members were reassigned to work on other top priorities such as AI integrations. There is still a SEG working on Service Desk. This MR updates stages.yml to tranfer ownership of the product category.

Approvals

Merge requests with changes to stages and groups and significant changes to categories need to be created, approved, and/or merged by each of the below:

• Chief Product Officer @david
• The Product Director relevant to the affected Section(s) @hbenson
• The Engineering leader relevant to the affected Section(s)
  • @sgoldstein
  • @bmarnane
• Director of Product Design @vkarnes

The following people need to be on the merge request so they stay informed:

• CTO @joergheilig
• Vice President of Development @clefelhocz1
• Vice President of Infrastructure and Quality @meks
• Director of Technical Writing @susantacker

---