Use source-build-assets repo

Author: NikolaMilosavljevic

eng/Version.Details.xml

@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.23468.3">
-      <Uri>https://github.com/dotnet/source-build-reference-packages</Uri>
-      <Sha>b88b567fbf54c5404d039b80cfb86f09a681f604</Sha>
-      <SourceBuild RepoName="source-build-reference-packages" ManagedOnly="true" />
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-assets" Version="9.0.0-alpha.1.26208.6">
+      <Uri>https://github.com/dotnet/source-build-assets</Uri>
+      <Sha>8e19a1b4f607fcbecc4edbd322d77a60d4e25c3c</Sha>
+      <SourceBuild RepoName="source-build-assets" ManagedOnly="true" />
     </Dependency>
     <Dependency Name="Microsoft.SourceBuild.Intermediate.msbuild" Version="17.7.0-preview-23217-02">
       <Uri>https://github.com/dotnet/msbuild</Uri>
@@ -60,4 +60,4 @@
       <Sha>ee166d79f3a269d2a1c6b7d400df7e284b1aa67b</Sha>
     </Dependency>
   </ToolsetDependencies>
-</Dependencies>
+</Dependencies>