chore(deps): update dependency @eslint/markdown to v8

Author: renovate[bot]

package.json

@@ -40,7 +40,7 @@
   "devDependencies": {
     "@antfu/eslint-config": "^7.7.3",
     "@eslint/js": "^10.0.1",
-    "@eslint/markdown": "^7.5.1",
+    "@eslint/markdown": "^8.0.0",
     "@slidev/cli": "^52.14.1",
     "@typescript-eslint/eslint-plugin": "^8.57.1",
     "conventional-github-releaser": "^3.1.5",