Add mention background screening re-checks to support ISO 27001:2022

Why is this change being made?

GitLab will be pursuing ISO 27001:2022 certification in Sept. 2024. The 2022 standard of ISO mentions that "background verification checks should be carried out prior to joining the organization and on an ongoing basis". Further that "verification checks should be repeated periodically to confirm ongoing suitability of personnel, depending on the criticality of a person’s role".

GitLab does not perform background re-checks for current team members with the exception of if it's required by specific customers. By adding this to the policy, we document our stance on the requirement and prevent future questions from any auditors.

💡 Provide a detailed answer to the question on why this change is being proposed, in accordance with our value of Transparency.

Please add the details saying why, not just what in this section. Example: We have discussed the topic in Slack - (copy of Slack conversation). The current process is not efficient, this MR makes the description of X more clear, and helps move Y forward.

CHANGEME

Author and Reviewer Checklist

Please verify the check list and ensure to tick them off before the MR is merged.

• 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
• For transparency, share this MR with the audience that will be impacted.
  • Team: For changes that affect your direct team, share in your group Slack channel
  • Department: If the update affects your department, share the MR in your department Slack channel
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Commits

• Update file _index.md

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