Describe the bug

On the page of an author a new "image" has appeared towards the top of the left nav. This appears to be a flag of the country associated with the author but all of these images are 404.

A quick test shows that it is uppercase filenames in the image link whereas the image files themselves are in lowercase

To Reproduce Steps to reproduce the behavior:

1. Go to https://metacpan.org/author/LEEJO
2. See "CH Flag" in the left nav next to "Villars-sur-Ollon, Vaud"
3. Right click to open this image in isolation
4. See that https://metacpan.org/static/images/flag/CH.png is 404
5. Edit this URL to https://metacpan.org/static/images/flag/ch.png and the flag magically appears.

Expected behavior

The image links should refer to the lowercase filenames so that the flag images appear in the left nav.

Screenshots

Desktop (please complete the following information):

• OS: Slackware Linux 64
• Browser Firefox
• Version 144.0.2