fix: tools/doc/package.json & tools/doc/package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-NTHCHECK-1586032

Author: snyk-bot

tools/doc/package-lock.json

@@ -15,7 +15,7 @@
     "to-vfile": "^5.0.1",
     "unified": "^7.0.0",
     "unist-util-find": "^1.0.1",
-    "unist-util-select": "^1.5.0",
+    "unist-util-select": "^3.0.3",
     "unist-util-visit": "^1.4.0"
   },
   "devDependencies": {