Add checkout to pages

Author: dplewis

.github/workflows/pages.yml

@@ -11,6 +11,11 @@ jobs:
     runs-on: ubuntu-18.04
     timeout-minutes: 30
     steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js
+      uses: actions/setup-node@v1
+      with:
+        node-version: '10.14'
     - name: Get Tag
       id: tag
       run: |