Update README.md

Author: grey-lovelace

README.md

@@ -56,12 +56,12 @@ migration = AgnosticMigration(apply, revert)
 
 ## WHY?
 
-Having an agnostic migration tool is very helpful for 2 cases:
+Having an agnostic migration tool is very helpful for 3 cases:
 
 1. The tool you are wanting to manage is not a traditional relational database, and you want to be able to use a liquibase/flyway style migration to manage its state reliably and at scale.
 2. You want to be able to manage the migrations or state of multiple dependencies with the same tooling.
 3. You want to be able to leverage existing code in your codebase to interact with the tool and create the migrations.  This can be something like an sdk you are familiar with, or custom code you have already written for your application.
 
 ## Inspiration
 
-This library was created as a lightweight python implementation of a pattern similar to [Umzug](https://github.com/sequelize/umzug), which is a similar tool written for typescript.
+This library was created as a lightweight python implementation of a pattern similar to [Umzug](https://github.com/sequelize/umzug), which is a similar tool written for typescript.