Update @github/copilot-sdk

[tmeschter]

Update the version of the @github/copilot-sdk package we're using to 0.1.125.

[github-actions]

Thanks for filing this, @tmeschter!

This has been labeled as an enhancement and dependencies since it's a straightforward package version bump for @github/copilot-sdk to 0.1.125. The assign-to-copilot label has also been applied, so a coding agent will take a look and handle the update.

Generated by Issue Triage for issue #1027