docs: add catppuccin/blockbench

Closes #228

README.md

@@ -913,8 +913,9 @@ Catppuccin is available for various apps and in different formats. Here is a lis
 -   [Spicetify](https://github.com/catppuccin/spicetify)
 -   [Spotify-Player](https://github.com/catppuccin/spotify-player)
 -   [Spotify-TUI](https://github.com/catppuccin/spotify-tui)
--   [Steam](https://github.com/catppuccin/steam)
 -   [Last.fm](https://github.com/catppuccin/lastfm)
+-   [Steam](https://github.com/catppuccin/steam)
+-   [Blockbench](https://github.com/catppuccin/blockbench)
 
 #### Browsers