Update file tech_stack.yml in support of Andrew Kelly's transition away from AppSec Management

Tech Stack - Update Existing System

Please do not merge before the Business Systems Analysts have reviewed and approved!

Questions? Ask in #tech-owners_tech-stack Slack channel.

Business/Technical System Owner or Delegate to Complete

• Rename this MR's title to [System Name] - Tech Stack - Update Existing System

• Update data field(s) for the existing system within the 'Changes' tab of this MR. Commit update when ready. More instructions are here.

Are you changing the existing system's provisioner(s)?

• Yes. Create an Issue to add the new provisioner(s) of the system to the appropriate Google/Slack/GitLab groups:
  • Issue Link: https://gitlab.com/gitlab-com/team-member-epics/access-requests/-/issues/29018
• No

Are you removing an existing system from the Tech Stack?

• Yes. Be sure to complete a Tech Stack Offboarding Issue as well. Offboarding Issue Link:
• No

Security Risk Team to Complete

Not required prior to merging.

• Once updates are finalized and if necessary, communicate change to impacted parties (e.g. Security Compliance)