Update dependencies from https://github.com/dotnet/source-build-reference-packages build 20251015.4

On relative base path root
Microsoft.SourceBuild.Intermediate.source-build-reference-packages From Version 8.0.0-alpha.1.25507.1 -> To Version 8.0.0-alpha.1.25515.4

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -243,9 +243,9 @@
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-runtime</Uri>
       <Sha>81cabf2857a01351e5ab578947c7403a5b128ad1</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="8.0.0-alpha.1.25507.1">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="8.0.0-alpha.1.25515.4">
       <Uri>https://github.com/dotnet/source-build-reference-packages</Uri>
-      <Sha>7a3266db9e2b7422e8277f04932eff9b7064b66e</Sha>
+      <Sha>4f39ba9e117ece1679a2bd4f2e8c188f914078e1</Sha>
       <SourceBuild RepoName="source-build-reference-packages" ManagedOnly="true" />
     </Dependency>
     <Dependency Name="Microsoft.DotNet.XliffTasks" Version="1.0.0-beta.23475.1" CoherentParentDependency="Microsoft.DotNet.Arcade.Sdk">