Update README.md

README.md

@@ -15,7 +15,7 @@ This script is a slight modification of [this script](https://github.com/BookSta
 - php ```~7.2+```
 - curl
 - BookStack API ```TOKEN_ID```
-- TBookStack API ```TOKEN_SECRET```
+- BookStack API ```TOKEN_SECRET```
 - Markdown CSS file. One can be found here [http://markdowncss.github.io/](http://markdowncss.github.io/)
 - A URL Slug of the desierd book you wish to export. e.g. https://bookstack.example.com/books/**example-book**
 - A directory where you wish the book to be saved