Fix incorrect color fringe colors on SVG:s (#7069)

This is a problem that affected the fringes on all SVG:s with
transparency, especially on a light background.

## Before

![image](https://github.com/user-attachments/assets/342823ad-005c-4f82-83a6-d2dcccfd3221)


## After

![image](https://github.com/user-attachments/assets/73398265-d333-461b-8c2b-fce405d95a9c)

crates/egui_extras/src/image.rs

@@ -295,7 +295,7 @@ pub fn load_svg_bytes_with_size(
         &mut pixmap.as_mut(),
     );
 
-    let image = egui::ColorImage::from_rgba_unmultiplied([w as _, h as _], pixmap.data());
+    let image = egui::ColorImage::from_rgba_premultiplied([w as _, h as _], pixmap.data());
 
     Ok(image)
 }