refine material icons preload docs ordering

Agent-Logs-Url: https://github.com/MudBlazor/MudBlazor.Icons/sessions/9eec0945-aad2-4b3c-95af-58949556483e

Co-authored-by: ScarletKuro <19953225+ScarletKuro@users.noreply.github.com>

Author: Copilot

documentation/material_icons_usage.md

@@ -9,13 +9,7 @@
 | 1.0.0  => |     7.0.0-preview.4 =>      |     .NET 7 & NET 8      |
 
 
-To use the icons in your MudBlazor project, you can add the following CSS link to your HTML or Razor layout:
-
-```html
-<link href="_content/MudBlazor.FontIcons.MaterialIcons/css/font.min.css" rel="stylesheet" />
-```
-
-To reduce first-load flicker, preload the Material Icons font files before loading the stylesheet:
+To use the icons in your MudBlazor project while reducing first-load flicker, preload the Material Icons font files before loading the stylesheet:
 
 ```html
 <link rel="preload"