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

…ence-packages build 20231218.2 (#96309)

Microsoft.SourceBuild.Intermediate.source-build-reference-packages
 From Version 9.0.0-alpha.1.23615.3 -> To Version 9.0.0-alpha.1.23618.2

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

eng/Version.Details.xml

@@ -99,9 +99,9 @@
       <Sha>13ad0749b943e56246a8c40aea3e58648dfa0996</Sha>
       <SourceBuild RepoName="emsdk" ManagedOnly="true" />
     </Dependency>
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.23615.3">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="9.0.0-alpha.1.23618.2">
       <Uri>https://github.com/dotnet/source-build-reference-packages</Uri>
-      <Sha>ad274914920e8e51c5269d215a641e592af8182c</Sha>
+      <Sha>c49c1f4e461b4b57d6d3449671942786bf8fcbb6</Sha>
       <SourceBuild RepoName="source-build-reference-packages" ManagedOnly="true" />
     </Dependency>
     <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-externals" Version="9.0.0-alpha.1.23611.2">