Change docblock to reflect media orientation

[westonruter]

I noticed this copy pasta from FileTypeEnum as I was browsing the source.

Introduced in a6a83cb.

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: westonruter <westonruter@git.wordpress.org>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.12%. Comparing base (6317042) to head (08b9ad6).

Additional details and impacted files

@@            Coverage Diff            @@
##              trunk     #228   +/-   ##
=========================================
  Coverage     88.12%   88.12%           
  Complexity     1213     1213           
=========================================
  Files            60       60           
  Lines          3934     3934           
=========================================
  Hits           3467     3467           
  Misses          467      467           

Flag	Coverage Δ
unit	88.12% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.