Remove CSS reference instructions from documentation

This commit removes the section that instructed users to add CSS references, including the relevant code snippet and description. This section was previously located after the instruction to add the NuGet package and before the instruction to add JS references.

NOTE: This commit message is auto-generated using GitHub Copilot.

Author: gvreddy04

BlazorExpress.ChartJS.Demo.RCL/Pages/Docs/GettingStarted/net8/GettingStarted_02_NET_8_WebApp_Server_Documentation.razor

@@ -42,11 +42,6 @@
                     <b>Add the NuGet package:</b>
                     <CodeChunk Class="mt-3" LanguageCode="LanguageCode.Text" FilePath="~\Pages\Docs\GettingStarted\net8\01_A_Manual_Install_01_Snippet.razor" ProjectRootClassType="DemoAppConstants.ProjectRootClassType" />
                 </li>
-                <li>
-                    <b>Add CSS references:</b>
-                    <Block>After the <code>base</code> tag in the <code>head</code> section of the <code>Components/App.razor</code> file, add the following references:</Block>
-                    <CodeChunk Class="mt-3" LanguageCode="LanguageCode.HTML" FilePath="~\Pages\Docs\GettingStarted\net8\01_A_Manual_Install_02_Snippet.html" ProjectRootClassType="DemoAppConstants.ProjectRootClassType" />
-                </li>
                 <li>
                     <b>Add JS references:</b>
                     <Block>Insert the following references into the <code>body</code> section of the <code>Components/App.razor</code> file, immediately after the <code>_framework/blazor.web.js</code> reference:</Block>