Fix link in events_tutorial.md

Fix broken link.

Author: Amanda Butler

docs/tutorials/using_apis/events_tutorial.md

@@ -158,4 +158,4 @@ This is only a small part of how event queues work in Mbed OS. The `EventQueue`,
 
 The EventQueue API provides a mechanism for creating a static queue, a queue that doesn't use any dynamic memory allocation and accepts only user-allocated events. After you create a static queue (by passing zero as `size` to its constructor), you can post `UserAllocatedEvent` to it. Using static EventQueue combined with UserAllocatedEvent ensures no dynamic memory allocation will take place during queue creation and events posting and dispatching. You can also declare queues and events as static objects (static in the C++ sense), and then memory for them will be reserved at compile time:
 
-[![View code](https://www.mbed.com/embed/?url=https://github.com/ARMmbed/mbed-os-examples-docs_only/blob/master/events/static-event-queue/UserAllocatedEvent_ex_1/)](https://github.com/ARMmbed/mbed-os-examples-docs_only/blob/events/static-event-queue/UserAllocatedEvent_ex_1/main.cpp)
+[![View code](https://www.mbed.com/embed/?url=https://github.com/ARMmbed/mbed-os-examples-docs_only/blob/master/events/static-event-queue/UserAllocatedEvent_ex_1/)](https://github.com/ARMmbed/mbed-os-examples-docs_only/blob/master/events/static-event-queue/UserAllocatedEvent_ex_1/main.cpp)