actualized github workflow for markdownlint - modern node setup action

Author: xHasKx

.github/workflows/markdownlint.yml

@@ -9,15 +9,10 @@ jobs:
 
       # NOTE: heavy node.js is used only to run markdownlint - the same tool as in my editor (Visual Studio Code)
 
-      # source: https://github.com/nodesource/distributions#debian-and-ubuntu-based-distributions
-      - name: add node.js deb source
-        run: |
-          sudo apt-get install -y ca-certificates curl gnupg && sudo mkdir -p /etc/apt/keyrings \
-          && curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | sudo gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg \
-          && NODE_MAJOR=20 \
-          && echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$NODE_MAJOR.x nodistro main" | sudo tee /etc/apt/sources.list.d/nodesource.list
-      - name: install node.js
-        run: sudo apt-get update && sudo apt-get install nodejs -y
+      - name: install node.js (current LTS)
+        uses: actions/setup-node@v4
+        with:
+          node-version: 'lts/*'
 
       - name: install markdownlint-cli
         run: sudo npm install -g markdownlint-cli