add linkerd2 adopter vernacular.ai
- [Paybase](https://paybase.io/)
- [PlayStudios Asia](https://www.playstudios.asia)
- [Studyo](https://studyo.co)
+- [Vernacular.ai](https://vernacular.ai/)
If you're using Linkerd 2.x and aren't on this list, please [submit a pull
request](https://github.com/linkerd/linkerd2/pulls)!
