chore(deps): update davidanson/markdownlint-cli2-action action to v20

Author: renovate[bot]

.github/workflows/integrate.yml

@@ -57,7 +57,7 @@ jobs:
         uses: actions/[email protected]
 
       - name: 🧐 Lint Markdown files
-        uses: DavidAnson/markdownlint-cli2-action@v19.1.0
+        uses: DavidAnson/markdownlint-cli2-action@v20.0.0
         with:
           globs: |
             **/*.md