Remove Railway from free hosting options

As seen in the following reddit post, Railway has discontinued their free hosting plan.

https://www.reddit.com/r/webdev/comments/143tfc2/railway_the_heroku_alternative_shuts_down_their/?utm_source=share&utm_medium=android_app&utm_name=androidcss&utm_term=2&utm_content=share_button

Author: IggsGrey

src/content/3/en/part3b.md

@@ -101,7 +101,6 @@ There are also some other free options hosting options that work well for this c
 
 Some course participants have also used the following
 
-- [Railway](https://railway.app/)
 - [Cyclic](https://www.cyclic.sh/)
 - [Replit](https://replit.com)
 - [CodeSandBox](https://codesandbox.io)