Update README link and app description copy

- updates extension for Raycast extension (transferred ownership)
- removes an outdated reference to CoffeeScript

Author: djpowers

README.md

@@ -68,7 +68,7 @@ The app's main goals are to:
 
 ## App
 
-The web app is all client-side JavaScript, written in [CoffeeScript](http://coffeescript.org), and powered by a small [Sinatra](http://www.sinatrarb.com)/[Sprockets](https://github.com/rails/sprockets) application. It relies on files generated by the [scraper](#scraper).
+The web app is all client-side JavaScript, powered by a small [Sinatra](http://www.sinatrarb.com)/[Sprockets](https://github.com/rails/sprockets) application. It relies on files generated by the [scraper](#scraper).
 
 Many of the code's design decisions were driven by the fact that the app uses XHR to load content directly into the main frame. This includes stripping the original documents of most of their HTML markup (e.g. scripts and stylesheets) to avoid polluting the main frame, and prefixing all CSS class names with an underscore to prevent conflicts.
 
@@ -177,7 +177,7 @@ Made something cool? Feel free to open a PR to add a new row to this table! You
 | [waiting-for-dev/vim-www](https://github.com/waiting-for-dev/vim-www)                       | Vim plugin                           | ![Latest GitHub commit](https://img.shields.io/github/last-commit/waiting-for-dev/vim-www?logo=github&label)         | ![GitHub stars](https://img.shields.io/github/stars/waiting-for-dev/vim-www?logo=github&label)         |
 | [luckasRanarison/nvim-devdocs](https://github.com/luckasRanarison/nvim-devdocs)             | Neovim plugin                        | ![Latest GitHub commit](https://img.shields.io/github/last-commit/luckasRanarison/nvim-devdocs?logo=github&label)    | ![GitHub stars](https://img.shields.io/github/stars/luckasRanarison/nvim-devdocs?logo=github&label)    |
 | [toiletbril/dedoc](https://github.com/toiletbril/dedoc)                                     | Terminal based viewer                | ![Latest GitHub commit](https://img.shields.io/github/last-commit/toiletbril/dedoc?logo=github&label)                | ![GitHub stars](https://img.shields.io/github/stars/toiletbril/dedoc?logo=github&label)                |
-| [Raycast Devdocs](https://www.raycast.com/pomdtr/devdocs)                                     | Raycast extension                | Unavailable                | Unavailable                |
+| [Raycast Devdocs](https://www.raycast.com/djpowers/devdocs)                                 | Raycast extension                    | Unavailable                 | Unavailable                |
 
 ## Copyright / License