Update service desk doc link in Handbook

Why is this change being made?

As a follow up to gitlab-org/gitlab!127314 (merged), we'll need to update the following:

  ./data/release_posts/16_0/monitor-allow-issue-description-in-thank-youmd.yml
  ./data/release_posts/16_1/monitor-comment-author.yml
  ./data/release_posts/16_1/monitor-service-desk-issue-url.yml
  ./data/team_members/person/b/briecarranza.yml
  ./data/team_members/person/w/weimeng.yml
  ./data/categories.yml
  ./data/features.yml
  ./sites/handbook/source/handbook/customer-success/csm/customer-collaboration-project/index.html.md
  ./sites/handbook/source/handbook/marketing/developer-relations/evangelist-program/index.html.md.erb
  ./sites/handbook/source/handbook/support/workflows/service_desk_troubleshooting.html.md
  ./sites/handbook/source/handbook/support/index.html.md.erb
  ./sites/handbook/source/handbook/support/index.html.md.erb
  ./sites/uncategorized/source/company/cadence/index.html.md
  ./sites/uncategorized/source/stages-devops-lifecycle/service-desk/index.html.haml
  ./sites/uncategorized/source/stages-devops-lifecycle/service-desk/index.html.haml
  ./source/direction/monitor/service_desk/index.html.md.erb

Author Checklist

• Provided a concise title for this Merge Request (MR)
• Added a description to this MR explaining the reasons for the proposed change, per say why, not just what
  • Copy/paste the Slack conversation to document it for later, or upload screenshots. Verify that no confidential data is added, and the content is SAFE
• Assign reviewers for this MR to the correct Directly Responsible Individual/s (DRI)
  • If the DRI for the page/s being updated isn’t immediately clear, then assign it to one of the people listed in the Maintained by section on the page being edited
  • If your manager does not have merge rights, please ask someone to merge it AFTER it has been approved by your manager in #mr-buddies
  • The when to get approval handbook section explains the workflow in more detail
• If the changes affect team members, or warrant an announcement in another way, please consider posting an update in #whats-happening-at-gitlab linking to this MR
  • If this is a change that directly impacts the majority of global team members, it should be a candidate for #company-fyi. Please work with internal communications and check the handbook for examples.

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