chore(deps): update actions/setup-node action to v3

Author: renovate-bot

.github/workflows/markdown-lint.yml

@@ -27,7 +27,7 @@ jobs:
                   EMAIL: "github-actions[bot]@users.noreply.github.com"
 
             - name: "Use Node.js 14.x"
-              uses: "actions/setup-node@v2"
+              uses: actions/setup-node@v3
               with:
                   node-version: "14.16.0"