[main] Update dependencies from dotnet/source-build-externals (#48454)

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

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -495,9 +495,9 @@
       <SourceBuild RepoName="command-line-api" ManagedOnly="true" />
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-externals" Version="10.0.620701">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-externals" Version="10.0.621401">
       <Uri>https://github.com/dotnet/source-build-externals</Uri>
-      <Sha>ebe6fe9cc5b8b9c87cb218b35514bf9d04475047</Sha>
+      <Sha>d64d8da45618323a39fb77860d1140bdbcd506ad</Sha>
       <SourceBuild RepoName="source-build-externals" ManagedOnly="true" />
     </Dependency>
     <!-- Intermediate is necessary for source build. -->