Update README.md (#2155)

Add link to introductory blog post

Author: meblum

README.md

@@ -9,7 +9,7 @@ sqlc generates **type-safe code** from SQL. Here's how it works:
 1. You run sqlc to generate code with type-safe interfaces to those queries.
 1. You write application code that calls the generated code.
 
-Check out [an interactive example](https://play.sqlc.dev/) to see it in action.
+Check out [an interactive example](https://play.sqlc.dev/) to see it in action, and the [introductory blog post](https://conroy.org/introducing-sqlc) for the motivation behind sqlc.
 
 ## Overview