Merge pull request #62 from farez/patch-1

Updated README.md

Author: mechelon

README.md

@@ -111,6 +111,7 @@ If you discover any security related issues, please email hello@dianaweb.dev ins
 
 - Julien Nahum created [notionforms.io](https://notionforms.io) with [laravel-notion-api](https://github.com/5am-code/laravel-notion-api), which allows you to easily create custom forms, based on your selected database within notion.
 - [GitHub Notion Sync](https://githubnotionsync.com/), a service by [Beyond Code](https://beyondco.de) to sync the issues of multiple GitHub repositories into a Notion database
+- [Notion Invoice](https://notioninvoice.com/), the first premium invoicing solution for freelancers and businesses that use Notion. Create beautiful PDF invoices from your Notion data.
 
 Using this package in your project? Open a PR to add it in this section!