Change BitcartCC license to MIT (#3549)

README.md

@@ -1339,7 +1339,7 @@ Software that does not fit in another section.
 _See also: [awesome-sysadmin/IT Asset Management](https://github.com/awesome-foss/awesome-sysadmin#it-asset-management)_
 
 - [Akaunting](https://akaunting.com/) - Akaunting is a free, online and open source accounting software designed for small businesses and freelancers. ([Source Code](https://github.com/akaunting/akaunting)) `GPL-3.0` `PHP`
-- [BitcartCC](https://bitcartcc.com) - A self-hosted cryptocurrencies payment processor and development platform. ([Demo](https://admin.bitcartcc.com), [Source Code](https://github.com/bitcartcc)) `GPL-3.0-or-later` `Docker/Python/Nodejs`
+- [BitcartCC](https://bitcartcc.com) - A self-hosted cryptocurrencies payment processor and development platform. ([Demo](https://admin.bitcartcc.com), [Source Code](https://github.com/bitcartcc)) `MIT` `Docker/Python/Nodejs`
 - [BTCPay Server](https://btcpayserver.org/) - A self-hosted Bitcoin and other cryptocurrencies payment processor. ([Demo](https://mainnet.demo.btcpayserver.org/), [Source Code](https://github.com/btcpayserver/)) `MIT` `C#`
 - [budgetzero](https://github.com/budgetzero/budgetzero) - Free, self-hosted, open-source, envelope-budgeting web and desktop app. ([Demo](https://app.budgetzero.io/budget)) `AGPL-3.0` `Nodejs`
 - [Crater](https://github.com/crater-invoice/crater) - Free & Open Source Invoice App for Freelancers & Small Businesses. ([Demo](https://demo.craterapp.com/)) `AAL` `PHP`