Update dependencies from https://github.com/dotnet/source-build-externals build 20230912.2 (#50778)

[main] Update dependencies from dotnet/source-build-externals

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -189,9 +189,9 @@
       <Uri>https://github.com/dotnet/runtime</Uri>
       <Sha>da3500bb02343b1d0424c74ccdddbc592b5b3f4f</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-externals" Version="8.0.0-alpha.1.23461.2">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-externals" Version="9.0.0-alpha.1.23462.2">
       <Uri>https://github.com/dotnet/source-build-externals</Uri>
-      <Sha>f379c3367804237751f13311b5dddbfafc86be40</Sha>
+      <Sha>8bfc83caa5ac779edbfe8c23544b5cae8044402a</Sha>
       <SourceBuild RepoName="source-build-externals" ManagedOnly="true" />
     </Dependency>
     <Dependency Name="System.Configuration.ConfigurationManager" Version="8.0.0-rc.2.23457.7">

eng/Versions.props

@@ -164,7 +164,7 @@
     <MicrosoftDotNetBuildTasksTemplatingVersion>8.0.0-beta.23463.1</MicrosoftDotNetBuildTasksTemplatingVersion>
     <MicrosoftDotNetRemoteExecutorVersion>8.0.0-beta.23463.1</MicrosoftDotNetRemoteExecutorVersion>
     <!-- Packages from dotnet/source-build-externals -->
-    <MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>8.0.0-alpha.1.23461.2</MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>
+    <MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>9.0.0-alpha.1.23462.2</MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>
     <!-- Packages from dotnet/source-build-reference-packages -->
     <MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>9.0.0-alpha.1.23465.1</MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>
     <!-- Packages from dotnet/symreader -->