docs: update announcements to add stable release

Author: Sébastien Chopin

docs/content/1.docs/5.community/5.roadmap.md

@@ -10,6 +10,8 @@ This page lists the current status and schedule of our planned releases.
 
 ## 📢 Announcements
 
+
+- Nov 16, 2022: [Nuxt 3 Stable](/v3)
 - Oct 12, 2021: [Nuxt 3 Beta](https://nuxtjs.org/announcements/nuxt3-beta/)
 - April 20, 2022: [Nuxt 3 Release Candidate](https://nuxtjs.org/announcements/nuxt3-rc/)
 - May 25, 2022: [Nuxt Content v2 Release](https://content.nuxtjs.org/blog/announcing-v2)