add markdownlint to CI

.forgejo/workflows/lint.yml

@@ -12,6 +12,12 @@ jobs:
       - run: echo "🔎 The name of your branch is ${{ github.ref }} and your repository is ${{ github.repository }}."
       - name: Check out repository code
         uses: actions/checkout@v4
+      - name: Lint Markdown files
+        uses: actions/markdownlint-cli2-action@v17
+        with:
+          globs: |
+            **/*.md
+            !vendor/*.md
       - name: Install linters using Composer
         run: |
           export COMPOSER_HOME=/tmp
@@ -20,7 +26,7 @@ jobs:
           composer require --dev bamarni/composer-bin-plugin
           composer bin phplint require --dev overtrue/phplint
           composer require --dev friendsofphp/php-cs-fixer
-      - name: Lint
+      - name: Lint PHP files
         run: vendor/bin/phplint --no-cache --no-progress --exclude=vendor --verbose
       - name: PHP CS Fixer
         run: vendor/bin/php-cs-fixer fix --dry-run --verbose --diff .