Fill out the uses step to run the checkout action with the repository abystoma/external-workflow and commit reference 3eb718710f20d7df6874acdc41e189a2ae4182f5.
name: commit_checkout
on: [push]
jobs:
external-workflow:
runs-on: ubuntu-latest
steps:
- ??
- name: Greetings
run: echo "$(<greeting.txt)"After successfully running the workflow, go to the Actions tab and click on the name of the workflow. What is the output of the stage, "Greetings".