[CI] Possible fix for regression caused by #214

Changes in file .github/workflows/markdown-lint.yml:
 - Possible fix for missing markdownlint with local install.

Changes in file package.json:
 - added script config

Author: reactive-firewall

.github/workflows/markdown-lint.yml

@@ -63,10 +63,10 @@ jobs:
         if: ${{ !cancelled() }}
         run: |
           git ls-files --exclude-standard -z -- *.md **/*.md |\
-          xargs -0 -I{} markdownlint "{}" --config .markdownlint.yaml ;
+          xargs -0 -I{} "npm lint:md -- '{}' --config .markdownlint.yaml" ;
 
       - name: Lint Markdown Files with JSON config
         if: ${{ !cancelled() }}
         run: |
           git ls-files --exclude-standard -z -- *.md **/*.md |\
-          xargs -0 -I{} markdownlint "{}" --config .markdownlint.json ;
+          xargs -0 -I{} "npm lint:md -- '{}' --config .markdownlint.json" ;

package.json

@@ -2,5 +2,9 @@
 	"devDependencies": {
 		"markdownlint": "^0.31.1",
 		"markdownlint-cli": "^0.37.0"
+	},
+	"scripts": {
+		"lint:md": "command -v markdownlint >/dev/null && markdownlint ${@:2} || npx markdownlint ${@:2}",
+		"fix:md": "command -v markdownlint >/dev/null && markdownlint --fix ${@:2} || npx markdownlint --fix ${@:2}"
 	}
 }