tools: update lint-md-dependencies to rollup@2.75.6

PR-URL: #43386
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Mestery <mestery@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: nodejs-github-bot

tools/lint-md/package-lock.json

@@ -16,7 +16,7 @@
   "devDependencies": {
     "@rollup/plugin-commonjs": "^22.0.0",
     "@rollup/plugin-node-resolve": "^13.3.0",
-    "rollup": "^2.75.5",
+    "rollup": "^2.75.6",
     "rollup-plugin-cleanup": "^3.2.1"
   }
 }