tools: bump @node-core/doc-kit in /tools/doc in the doc group

Bumps the doc group in /tools/doc with 1 update: [@node-core/doc-kit](https://github.com/nodejs/doc-kit).


Updates `@node-core/doc-kit` from 1.0.2 to 1.2.0
- [Commits](https://github.com/nodejs/doc-kit/commits)

---
updated-dependencies:
- dependency-name: "@node-core/doc-kit"
  dependency-version: 1.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: doc
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

tools/doc/package-lock.json

@@ -2,6 +2,6 @@
   "name": "doc",
   "private": true,
   "dependencies": {
-    "@node-core/doc-kit": "1.0.2"
+    "@node-core/doc-kit": "1.2.1"
   }
 }