Update step-runner version to 0.13.0

What does this MR do?

Update step-runner version to 0.13.0.

Changes

From the step-runner changelog:

• v0.13.0
  • Scripts can export variables to ${{ export_file }}. See 253.
• v0.12.0
  • Windows binaries now properly include .exe file extension for consistency.
  • All platform binaries are now available for download as release assets directly attached to releases.
  • Simplified binary upload process by using GitLab API directly instead of glab CLI tool, making it consistent with other steps like create_gitlab_release.
  • Enhanced release notes now list available binary platforms (Windows, Linux, macOS, FreeBSD).