tools: apply more stringent blank-line linting for markdown files

Update remark-preset-lint-node to 1.9.0, which adds linting for
multiple consecutive blank lines.

PR-URL: #29447
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: Trott

tools/lint-md.js

@@ -9,7 +9,7 @@
     "markdown-extensions": "^1.1.1",
     "remark": "^10.0.1",
     "remark-lint": "^6.0.4",
-    "remark-preset-lint-node": "^1.8.0",
+    "remark-preset-lint-node": "^1.9.0",
     "unified-args": "^7.0.0",
     "unified-engine": "^6.0.1"
   },