updated README.md

Author: Jani Giannoudis

README.md

@@ -1,11 +1,11 @@
 <h1>Payroll Engine Client Test</h1>
 
-Library to test Payroll Engine clients:
+Library for testing Payroll Engine clients:
 - Case test: Validate the user input
 - Payrun test: Test the payrun results
 - Report test: Test report output data (not the report layout)
 
 ## Build
 Supported runtime environment variables:
-- *PayrollEngineSchemaDir* - the Json schema target direcotry (optional)
-- *PayrollEnginePackageDir* - the NuGet package target direcotry (optional)
+- *PayrollEngineSchemaDir* - the Json schema destination directory (optional)
+- *PayrollEnginePackageDir* - the NuGet package destination directory (optional)