Navigation v2.0.2: www update

Why is this change being made?

Related: gitlab-com/marketing/digital-experience/navigation#69 (closed)

Review App (this MR only covers handbook pages and a handful of website pages)

Checklist of review:

• Test all links in header
• Test all links in footer
• Test mobile header
• Test mobile footer
• Test safari header desktop
• Test safari header mobile
• Test Firefox header desktop
• Test Firefox header mobile
• Test search desktop
• Test search mobile
• Test tabbing

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.
• 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
• 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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