docs: fix typo in detoxs.md (#5579)

Author: javigomez

docs/detox.md

@@ -60,7 +60,7 @@ As you see, CodeceptJS test is shorter and easier to follow. By simplifying the
 
 ## Setup
 
-It is important to follow [Detox guide](https://github.com/wix/Detox/blob/master/docs/Introduction.GettingStarted.md) to build an application with Detox test instrouments included.
+It is important to follow [Detox guide](https://github.com/wix/Detox/blob/master/docs/Introduction.GettingStarted.md) to build an application with Detox test instruments included.
 
 After you install Detox, create configuration and build an application using `detox build` command, you are ready to integrate Detox with CodeceptJS.