Update dependencies from https://github.com/dotnet/source-build-reference-packages build 20250409.1 (#18466)

Microsoft.SourceBuild.Intermediate.source-build-reference-packages
 From Version 9.0.0-alpha.1.25204.3 -> To Version 9.0.0-alpha.1.25209.1

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

Author: dotnet-maestro[bot]

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.1.25204.3">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.25209.1">
       <Uri>https://github.com/dotnet/source-build-reference-packages</Uri>
-      <Sha>643689c88b1d5a0f1561383972c4189a0c673abe</Sha>
+      <Sha>7dbf5deea5bdccf513df73cba179c4c0ad106010</Sha>
       <SourceBuild RepoName="source-build-reference-packages" ManagedOnly="true" />
     </Dependency>
     <!-- Intermediate is necessary for source build. -->