[EngSys] Ensure all workflow trigger path folders end with "**"

[mikeharder]

If a workflow sets a trigger path folder like this, it only includes file in the first level dir.

on:
  pull_request:
    paths:
    - ".github"
    - "eng/tools"

To include all files under the folder recursively, it must end with "**":

on:
  pull_request:
    paths:
    - ".github/**"
    - "eng/tools/**"