Update the status of UX Debt age PI

Why is this change being made?

The average age of UX debt issues has been decreasing over the last several months. We're closely approaching our goal of 150 days to close (exceeded the goal with 148 as of today but still have a couple of weeks remaining in the month of December).

This MR updates the Status from Problem to Attention and we will watch to see if it remains below our target.

Author Checklist

• Provided a concise title for the MR
• Added a description to this MR explaining the reasons for the proposed change, per say-why-not-just-what
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• Assign reviewers for this change to the correct DRI(s)
  • 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 in 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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