Fix typo

Author: yv989c

README.md

@@ -180,7 +180,7 @@ var myQuery = dbContext.MyEntities
         i.PropC
     });
 ```
-The previous query will yield the expected results, but there's a catch. If the sequence of values in our list *is different* on every execution, the underline SQL query will be built in a way that's not optimal for SQL Server's query engine. Wasting system resources like CPU, memory, IO, and potentially affecting other queries in the instance.
+The previous query will yield the expected results, but there's a catch. If the sequence of values in our list *is different* on every execution, the underlying SQL query will be built in a way that's not optimal for SQL Server's query engine. Wasting system resources like CPU, memory, IO, and potentially affecting other queries in the instance.
 
 Let's take a look at the following query and the SQL that is generated by the [SQL Server Database Provider] as of version 5.0.11 when the query is materialized: