Update to deployguide_gha.md to be more complete for users

[timschps]

PR Summary into Azure/mlops-project-template

Checklist

I have:

• [x] read and followed the contributing guidelines
• [x] PR has a meaningful title
• [x] Summarized the changes
• [x] PR is ready to merge and NOT WORK IN PROGRESS

Changes

• added link to the WSL install guide and changed script editors to script runners
• changed how supported pipelines are represented

fixes #