Rollup merge of #104114 - GuillaumeGomez:background-image-path, r=notriddle

Fix invalid background-image file name

This is a follow-up of https://github.com/rust-lang/rust/pull/101702.

Apparently the image hash was the wrong one. You can see the error in https://doc.rust-lang.org/nightly/core/primitive.u16.html?search=hello too.

I really need to check if I can adds check for resources load errors in `browser-ui-test`.

cc ``````@jsha``````
r? ``````@notriddle``````