build(deps-dev): Bump watchpack from 2.0.0 to 2.0.1 in /docs (#5605)

Bumps [watchpack](https://github.com/webpack/watchpack) from 2.0.0 to 2.0.1.
- [Release notes](https://github.com/webpack/watchpack/releases)
- [Commits](https://github.com/webpack/watchpack/compare/v2.0.0...v2.0.1)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/package.json

@@ -7,7 +7,7 @@
     "vuepress-theme-cosmos": "^1.0.175"
   },
   "devDependencies": {
-    "watchpack": "^2.0.0"
+    "watchpack": "^2.0.1"
   },
   "scripts": {
     "preserve": "./pre.sh",