Mux offering sign up credit

Author: sarah11918

src/content/docs/en/guides/media/mux.mdx

@@ -29,7 +29,7 @@ Mux's APIs and web components work in Astro to compress and optimize your videos
 ## Prerequisites
 
 - An existing Astro project. Some features may additionally require an adapter installed for [on-demand server rendering](/en/guides/on-demand-rendering/).
-- A Mux account. If you don’t have an account, you can [sign up with Mux](https://dashboard.mux.com/login) for a free account.
+- A Mux account. If you don’t have an account, you can [sign up with Mux](https://dashboard.mux.com/login) using the code ASTRO to receive a $50 credit.
 
 ## Mux Player