Update how we frame our L&D benefit in the Remote Handbook

Why is this change being made?

As GitLab has grown, there has been more nuance added to the GitLab growth and development benefit than currently described on this page. To avoid confusion for current GitLab team members, this change is being made so that team members are pointed to the growth and development page for details related to eligible L&D expenses.

The Single Source of Truth for the Growth & Development benefit is here for reference: https://about.gitlab.com/handbook/total-rewards/benefits/general-and-entity-benefits/growth-and-development/

Note: This change does not change the availability or reimbursement amounts available as part of the Growth & Development benefit.

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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