Update markdown lint

Author: pamelafox

.github/workflows/lint-markdown.yml

@@ -14,9 +14,10 @@ jobs:
     steps:
       - name: Checkout repo
         uses: actions/checkout@v5
-      - name: Run markdownlint
-        uses: articulate/actions-markdownlint@v1
+      - name: Run markdownlint-cli2
+        uses: DavidAnson/markdownlint-cli2-action@v21
         with:
           config: .github/workflows/markdownlint-config.json
-          files: '**/*.md'
-          ignore: data/
+          globs: |
+            **/*.md
+            !data/**