Update dependencies from https://github.com/dotnet/source-build-reference-packages build 20230511.1 (#48201)

Microsoft.SourceBuild.Intermediate.source-build-reference-packages
 From Version 8.0.0-alpha.1.23225.2 -> To Version 8.0.0-alpha.1.23261.1

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

eng/Version.Details.xml

@@ -300,9 +300,9 @@
       <Sha>9a1c3e1b7f0c8763d4c96e593961a61a72679a7b</Sha>
       <SourceBuild RepoName="xdt" ManagedOnly="true" />
     </Dependency>
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="8.0.0-alpha.1.23225.2">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-reference-packages" Version="8.0.0-alpha.1.23261.1">
       <Uri>https://github.com/dotnet/source-build-reference-packages</Uri>
-      <Sha>4bf273ec25cc3983d6a5991cf0a4aa082cb255a5</Sha>
+      <Sha>1661f3710daecbc59ae9e163b1b7eec6c5fb7db0</Sha>
       <SourceBuild RepoName="source-build-reference-packages" ManagedOnly="true" />
     </Dependency>
     <!-- Not updated automatically -->

eng/Versions.props

@@ -154,7 +154,7 @@
     <!-- Packages from dotnet/source-build-externals -->
     <MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>8.0.0-alpha.1.23251.2</MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>
     <!-- Packages from dotnet/source-build-reference-packages -->
-    <MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>8.0.0-alpha.1.23225.2</MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>
+    <MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>8.0.0-alpha.1.23261.1</MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>
     <!-- Packages from dotnet/xdt -->
     <MicrosoftWebXdtVersion>7.0.0-preview.22423.2</MicrosoftWebXdtVersion>
   </PropertyGroup>