chore(deps): update dependency markdownlint-cli to v0.47.0

Author: renovate[bot]

sitzverteilung-frontend/package-lock.json

@@ -41,7 +41,7 @@
     "eslint": "9.39.2",
     "eslint-plugin-vue": "10.6.2",
     "jsdom": "27.2.0",
-    "markdownlint-cli": "0.46.0",
+    "markdownlint-cli": "0.47.0",
     "prettier": "3.6.2",
     "typescript": "5.9.3",
     "unplugin-fonts": "1.4.0",