Update to 'return of gitlab owned assets' section of the AUP to note that assets must be returned regardless of value unless otherwise agreed

Update to 'return of gitlab owned assets' section of the AUP to note that assets must be returned regardless of value unless otherwise agreed - to reduce confusion which may be caused by the 'returning property to GitLab' HB page which notes that only assets over $1000 need to be returned and that laptops can be retained in certain circumstances.

Corresponding clarification being made in the 'returning property to GitLab' HB page to note that the company reserves the right to request the return of any company device, of any value, for legal reasons.

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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