ICM: Readme fixes.

Author: dmitry-ivanov

README.md

@@ -103,7 +103,7 @@ class MyProtectedCommand extends Command
 ### Set custom timeout
 
 By default mutex is checking for a running command, and if it finds such it just exits. However, you can manually set
-required timeout for a mutex, so it can wait for another command to finish it's execution, instead of just quitting immediately.
+timeout for a mutex, so it can wait for another command to finish it's execution, instead of just quitting immediately.
 
 You can change mutex timeout by specifying `$mutexTimeout` field: