Update dependencies from https://dev.azure.com/dnceng/internal/_git/dotnet-wpf-int build 20200909.10 (#3513)

[release/3.1] Update dependencies from dnceng/internal/dotnet-wpf-int

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -79,9 +79,9 @@
       <Uri>https://github.com/dotnet/corefx</Uri>
       <Sha>0f7f38c4fd323b26da10cce95f857f77f0f09b48</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Wpf.DncEng" Version="4.8.1-preview2.19553.2">
+    <Dependency Name="Microsoft.DotNet.Wpf.DncEng" Version="4.8.1-servicing.20459.10">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-wpf-int</Uri>
-      <Sha>90e4d4d634d385b0213347e8c1e43a8ca0a002c2</Sha>
+      <Sha>c84d47ab55531700011ef1d66570231461f4854f</Sha>
     </Dependency>
     <Dependency Name="System.IO.Packaging" Version="4.7.0" CoherentParentDependency="Microsoft.NETCore.App.Runtime.win-x64">
       <Uri>https://github.com/dotnet/corefx</Uri>

eng/Versions.props

@@ -124,6 +124,6 @@
       It is worth reiterating that this package *should not* be consumed to build the product.
   -->
   <PropertyGroup>
-    <MicrosoftDotNetWpfDncEngVersion>4.8.1-preview2.19553.2</MicrosoftDotNetWpfDncEngVersion>
+    <MicrosoftDotNetWpfDncEngVersion>4.8.1-servicing.20459.10</MicrosoftDotNetWpfDncEngVersion>
   </PropertyGroup>
 </Project>