Update draft-pdf.yml

.github/workflows/draft-pdf.yml

@@ -1,27 +1,23 @@
-on:
-  push
+on: [push]
 
 jobs:
   paper:
     runs-on: ubuntu-latest
     name: Paper Draft
     steps:
-      - name: Use Node.js 20
-        uses: actions/setup-node@v2
-        with:
-          node-version: '20'
-
       - name: Checkout
         uses: actions/checkout@v2
-
       - name: Build draft PDF
         uses: openjournals/openjournals-draft-action@master
         with:
           journal: joss
+          # This should be the path to the paper within your repo.
           paper-path: paper/paper.md
-
       - name: Upload
         uses: actions/upload-artifact@v1
         with:
           name: paper
+          # This is the output path where Pandoc will write the compiled
+          # PDF. Note, this should be the same directory as the input
+          # paper.md
           path: paper/paper.pdf