chore(deps): bump @nuxtjs/sitemap from 2.2.1 to 2.3.0

Bumps [@nuxtjs/sitemap](https://github.com/nuxt-community/sitemap-module) from 2.2.1 to 2.3.0.
- [Release notes](https://github.com/nuxt-community/sitemap-module/releases)
- [Changelog](https://github.com/nuxt-community/sitemap-module/blob/dev/CHANGELOG.md)
- [Commits](https://github.com/nuxt-community/sitemap-module/compare/v2.2.1...v2.3.0)

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

package.json

@@ -34,7 +34,7 @@
     "@nuxtjs/gtm": "^2.2.3",
     "@nuxtjs/pwa": "^3.0.0-beta.20",
     "@nuxtjs/robots": "^2.4.2",
-    "@nuxtjs/sitemap": "^2.2.1",
+    "@nuxtjs/sitemap": "^2.3.0",
     "@nuxtjs/toast": "^3.3.0",
     "ace-builds": "^1.4.11",
     "firebase": "^7.14.3",