Merge pull request #87 from puppetlabs/maint-update_checkout_ref_gem_ci

(bug) - Fix broken conditional on windows

.github/workflows/gem_ci.yml

@@ -34,22 +34,13 @@ jobs:
       PUPPET_GEM_VERSION: ${{ inputs.puppet_gem_version }}
 
     steps:
-      # If we are on a PR, checkout the PR head sha, else checkout the default branch
-      # required when trigger set to pull_request_target
-      - name: "Set the checkout ref"
-        id: set_ref
-        run: |
-          if [[ "${{ github.event_name }}" == "pull_request_target" ]]; then
-            echo "ref=${{ github.event.pull_request.head.sha }}" >> $GITHUB_OUTPUT
-          else
-            echo "ref=${{ github.ref }}" >> $GITHUB_OUTPUT
-          fi
-
       - name: "checkout"
         uses: "actions/checkout@v4"
         with:
           fetch-depth: 1
-          ref: ${{ steps.set_ref.outputs.ref }}
+          # If we are on a PR, checkout the PR head sha, else checkout the default branch
+          # required when trigger set to pull_request_target, ternary syntax is "${{ x && 'ifTrue' || 'ifFalse'  }}"
+          ref: ${{ github.event_name == 'pull_request_target' && github.event.pull_request.head.sha || github.ref }}
 
       - name: "export environment"
         run: |