Update dependencies from https://github.com/dotnet/source-build-refer…

…ence-packages build 20240506.2 (dotnet#17122)

Microsoft.SourceBuild.Intermediate.source-build-reference-packages
 From Version 9.0.0-alpha.1.24252.1 -> To Version 9.0.0-alpha.1.24256.2

Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

eng/Version.Details.xml

@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.24252.1">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.24256.2">
       <Uri>https://github.com/dotnet/source-build-reference-packages</Uri>
-      <Sha>9c1cc994f8123ec2a923c5179c238c13da1b4ab7</Sha>
+      <Sha>a4c02499bef24d0e16255657ccdb160d26c82c32</Sha>
       <SourceBuild RepoName="source-build-reference-packages" ManagedOnly="true" />
     </Dependency>
     <!-- Intermediate is necessary for source build. -->