Update impl/README.md

Co-authored-by: Ricardo Zanini <1538000+ricardozanini@users.noreply.github.com>

Author: fjtirado

impl/README.md

@@ -142,7 +142,7 @@ To discuss runtime API we are going to use a couple of workflow:
 
 Here is a summary of what we are trying to do: We will start the `listen.yaml` workflow, which will be completed when it receives an event with the proper temperature. It won't block the main thread while waiting for it. Then, we will send an event with a lower temperature that will be ignored. Finally, we will send an event with a higher temperature to complete the waiting workflow. 
 
-The first step is to create a [WorkflowApplication](core/src/main/java/io/serverlessworkflow/impl/WorkflowApplication.java) instance. An application is an abstraction that allow customization of different aspect of the workflow execution (for example change the default `ExecutorService` for thread spawning)
+The first step is to create a [WorkflowApplication](core/src/main/java/io/serverlessworkflow/impl/WorkflowApplication.java) instance. An application is an abstraction that allows customization of different aspects of the workflow execution (for example, change the default `ExecutorService` for thread spawning)
 
 Since `WorkflowApplication` implements `Autocloseable`, we better use a try...finally block, ensuring any resource that might have been used by the workflow is freed when done.