Sync validate-markdown workflow with main (3.2.0) (OAI#3560)

* Sync validate-markdown workflow with main (3.2.0)

* Match latest environment from main

Author: handrews

.github/workflows/validate-markdown.yaml

@@ -18,10 +18,15 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2 # checkout repo content
-    - uses: actions/setup-node@v1 # setup Node.js
+    - uses: actions/checkout@v4 # checkout repo content
       with:
-        node-version: '12.x'
+        fetch-depth: 0
+    - name: use the javascript environment from main
+      run: |
+        git checkout remotes/origin/main -- package.json package-lock.json
+    - uses: actions/setup-node@v4 # setup Node.js
+      with:
+        node-version: '20.x'
     - name: Validate markdown
-      run: npx mdv versions/3.*.md
+      run: npx --yes mdv versions/3.*.md