Update README.md: Typo fix

corresonding -> corresponding

context.app/Contents/RUNME/README.md

@@ -47,7 +47,7 @@ invoking their behavior and changing their state.
 The behavior is performed by an instruction **processor**, also known
 as a **virtual machine**. Each time an object sends a message to
 another object, the processor performs the instructions in the method
-corresonding to that message. To keep track of the receiving object of
+corresponding to that message. To keep track of the receiving object of
 the message, which instruction it is performing, and intermediate
 results, the processor creates a **context** object corresponding to
 that particular invocation of the message.