Upgrade markdownlint-cli2 to 0.23.2

This upgrade eliminates the strict js-yaml 4.1.1 dependency.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: e49b75d8-25b6-4b16-9797-6f31ac6599f8

Author: cklin

extensions/ql-vscode/package-lock.json

@@ -2177,7 +2177,7 @@
     "jest-runner-vscode": "^3.0.1",
     "jsdom": "^27.0.1",
     "lint-staged": "^17.0.8",
-    "markdownlint-cli2": "^0.22.1",
+    "markdownlint-cli2": "^0.23.2",
     "markdownlint-cli2-formatter-pretty": "^0.0.9",
     "npm-run-all": "^4.1.5",
     "patch-package": "^8.0.1",