NuGet updates

.nuget/directxmath.nuspec

@@ -10,7 +10,7 @@
         <description>The DirectXMath API provides SIMD-friendly C++ types and functions for common linear algebra and graphics math operations common to DirectX applications. The library provides optimized versions for Windows 32-bit (x86), Windows 64-bit (x64), and Windows on ARM through SSE2 and ARM-NEON intrinsics support in the Visual Studio compiler.</description>
         <releaseNotes>Matches the April 2020 release.</releaseNotes>
         <projectUrl>http://go.microsoft.com/fwlink/?LinkID=615560</projectUrl>
-        <iconUrl>https://github.com/Microsoft/DirectXMath/wiki/X_jpg.jpg</iconUrl>
+        <icon>images\icon.jpg</icon>
         <license type="expression">MIT</license>
         <requireLicenseAcceptance>false</requireLicenseAcceptance>
         <copyright>© Microsoft Corporation. All rights reserved.</copyright>
@@ -24,6 +24,8 @@
         <file target="include" src="Inc\*" />
 
         <file src=".nuget/directxmath.targets" target="build\native" />
+
+        <file src=".nuget/icon.jpg" target="images\" />
       
     </files>
 </package>