chore(deps): update dependency @eslint/markdown to v8 (#296)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -28,7 +28,7 @@
     "@actions/github": "^9.0.0",
     "@eslint/eslintrc": "^3.2.0",
     "@eslint/js": "^10.0.0",
-    "@eslint/markdown": "^7.2.0",
+    "@eslint/markdown": "^8.0.0",
     "eslint": "^10.0.0",
     "eslint-config-prettier": "^10.0.0",
     "eslint-config-standard": "^17.1.0",