chore(deps-dev): bump nuxt-windicss from 2.4.2 to 2.6.0

Bumps [nuxt-windicss](https://github.com/windicss/nuxt-windicss) from 2.4.2 to 2.6.0.
- [Release notes](https://github.com/windicss/nuxt-windicss/releases)
- [Commits](https://github.com/windicss/nuxt-windicss/compare/v2.4.2...v2.6.0)

---
updated-dependencies:
- dependency-name: nuxt-windicss
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -32,7 +32,7 @@
     "@nuxt/typescript-build": "^2.1.0",
     "@nuxtjs/color-mode": "^2.1.1",
     "markdown-it-prism": "^2.2.4",
-    "nuxt-windicss": "^2.4.2",
+    "nuxt-windicss": "^2.6.0",
     "sass-loader": "^10.3.0",
     "windicss-analysis": "^0.3.5"
   }