docs: Update "What is Bedstack?" to include links for Bun, ElysiaJS, and Drizzle

Author: yamcodes

docs/what-is-bedstack.md

@@ -1,6 +1,6 @@
 # What is Bedstack?
 
-Bedstack is a bleeding-edge tech stack for building backend applications with TypeScript. It's an acronym for **B**un + **E**lysiaJS + **D**rizzleORM.
+Bedstack is a bleeding-edge tech stack for building backend applications with TypeScript. It's an acronym for [**B**un](https://bun.sh/) + [**E**lysiaJS](https://elysiajs.com/) + [**D**rizzle](https://orm.drizzle.team/).
 
 Its core philosophy is simplicity on the surface with immense power underneath; it will make you [fall into the pit of success](https://blog.codinghorror.com/falling-into-the-pit-of-success/). It is typesafe by default, and flexible enough to handle complex use cases as demonstrated by this [RealWorld](
   https://github.com/gothinkster/realworld