spelling: extension

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

README.md

@@ -119,7 +119,7 @@ Download Kutt's official workflow for [Alfred](https://www.alfredapp.com/) app f
 | Rust       | [urlshortener](https://github.com/vityafx/urlshortener-rs)                        | URL shortener library written in Rust              |
 | Rust       | [kutt-rs](https://github.com/robatipoor/kutt-rs)                                  | Command line tool written in Rust                  |
 | Node.js    | [node-kutt](https://github.com/ardalanamini/node-kutt)                            | Node.js client for Kutt.it url shortener           |
-| JavaScript | [kutt-vscode](https://github.com/mehrad77/kutt-vscode)                            | Visual Studio Code extention for Kutt              |
+| JavaScript | [kutt-vscode](https://github.com/mehrad77/kutt-vscode)                            | Visual Studio Code extension for Kutt              |
 | Java       | [kutt-desktop](https://github.com/cipher812/kutt-desktop)                         | A Cross platform Java desktop application for Kutt |
 | Go         | [kutt-go](https://github.com/raahii/kutt-go)                                      | Go client for Kutt.it url shortener                |
 | BASH       | [GitHub Gist](https://gist.github.com/hashworks/6d6e4eae8984a5018f7692a796d570b4) | Simple BASH function to access the API             |