Update README.md

Sorry, realized there was a small typo.

README.md

@@ -69,7 +69,7 @@ Inspired by the [awesome](https://github.com/sindresorhus/awesome) list thing. F
  - [Builder Book](https://builderbook.org) - Learn how to build a full stack JavaScript web app from scratch
  - [MongoDB Applied Design Patterns (Rick Copeland)](https://www.oreilly.com/library/view/mongodb-applied-design/9781449340056/)
  - [The Little MongoDB Book](https://www.openmymind.net/2011/3/28/The-Little-MongoDB-Book/) - Basic introduction
- - [Saas Boilerplate Book](https://builderbook.org/book) - Learn how to build a production-ready SaaS web app from scratch
+ - [SaaS Boilerplate Book](https://builderbook.org/book) - Learn how to build a production-ready SaaS web app from scratch
 
 ### Talks
  - [MongoDB Schema Design (Tugdual Grall, MongoDB Inc.)](https://www.youtube.com/watch?v=csKBT8zkRf0) [47']