Fix markdownlint negation patterns for fast-glob 3.3.3 compatibility

The @vscode/vsce bump transitively upgrades fast-glob from 3.3.2 to
3.3.3, which changed how negation patterns are resolved against absolute
paths (mrmlnc/fast-glob#441). The pattern `echo ___BEGIN___COMMAND_OUTPUT_MARKER___ ; PS1= ; PS2= ; unset HISTFILE ; EC=0 ; echo ___BEGIN___COMMAND_DONE_MARKER___0 ; }*/node_modules/**` no
longer works when the include pattern uses `../../` traversal.

Fix by matching the negation prefix to the include pattern prefix, i.e.
3.3.3.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: cklin

extensions/ql-vscode/package.json

@@ -2047,7 +2047,7 @@
     "format": "prettier --write **/*.{ts,tsx} && eslint . --fix",
     "lint": "eslint . --max-warnings=0",
     "lint-ci": "SARIF_ESLINT_IGNORE_SUPPRESSED=true eslint . --max-warnings=0 --format @microsoft/eslint-formatter-sarif --output-file=build/eslint.sarif",
-    "lint:markdown": "markdownlint-cli2 \"../../**/*.{md,mdx}\" \"!**/node_modules/**\" \"!**/.vscode-test/**\" \"!**/build/cli/v*/**\"",
+    "lint:markdown": "markdownlint-cli2 \"../../**/*.{md,mdx}\" \"!../../**/node_modules/**\" \"!../../**/.vscode-test/**\" \"!../../**/build/cli/v*/**\"",
     "find-deadcode": "vite-node scripts/find-deadcode.ts",
     "format-staged": "lint-staged",
     "storybook": "storybook dev -p 6006",