[release/8.0] Update dependencies from dotnet/source-build-externals

[dotnet-maestro[bot]]

This pull request updates the following dependencies

From https://github.com/dotnet/source-build-externals

• Subscription: b3379495-27ec-4d3f-8040-08dbca45f541

• Build: 20231018.1

• Date Produced: October 18, 2023 1:10:31 PM UTC

• Commit: 3dc05150cf234f76f6936dcb2853d31a0da1f60e

• Branch: refs/heads/release/8.0

• Updates:

  • Microsoft.SourceBuild.Intermediate.source-build-externals: from 8.0.0-alpha.1.23502.1 to 8.0.0-alpha.1.23518.1