Update dependencies from...

Update dependencies from https://dev.azure.com/dnceng/internal/_git/dotnet-wpf-int build 20200817.2 (#3342)

[master] Update dependencies from dnceng/internal/dotnet-wpf-int
- Updates:
  - Microsoft.DotNet.Wpf.DncEng: from 5.0.0-rc.1.20414.3 to 5.0.0-rc.1.20417.2

eng/Version.Details.xml

@@ -61,9 +61,9 @@
       <Uri>https://github.com/dotnet/runtime</Uri>
       <Sha>f35d747e8d7fe44d7dab76b9683d7c642ec26888</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Wpf.DncEng" Version="5.0.0-rc.1.20414.3">
+    <Dependency Name="Microsoft.DotNet.Wpf.DncEng" Version="5.0.0-rc.1.20417.2">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-wpf-int</Uri>
-      <Sha>ce881edd67d5f2a607c0b20848aad2f67cb94b31</Sha>
+      <Sha>a4aea6826b8c3e93f190e5ccb76cbf86eaee4b2d</Sha>
     </Dependency>
     <Dependency Name="System.IO.Packaging" Version="5.0.0-rc.1.20415.1" CoherentParentDependency="Microsoft.Private.Winforms">
       <Uri>https://github.com/dotnet/runtime</Uri>

eng/Versions.props

@@ -96,6 +96,6 @@
     <SystemReflectionMetadataLoadContextPackage>System.Reflection.MetadataLoadContext</SystemReflectionMetadataLoadContextPackage>
   </PropertyGroup>
   <PropertyGroup>
-    <MicrosoftDotNetWpfDncEngVersion>5.0.0-rc.1.20414.3</MicrosoftDotNetWpfDncEngVersion>
+    <MicrosoftDotNetWpfDncEngVersion>5.0.0-rc.1.20417.2</MicrosoftDotNetWpfDncEngVersion>
   </PropertyGroup>
 </Project>