Update README.md

Update link for new sync branch

Author: SaschaWillems

README.md

@@ -87,7 +87,7 @@ Vulkan consumes shaders in an intermediate representation called SPIR-V. This ma
 
 ## A note on synchronization
 
-Synchronization in the master branch currently isn't optimal und uses ```vkDeviceQueueWaitIdle``` at the end of each frame. This is a heavy operation and is suboptimal in regards to having CPU and GPU operations run in parallel. I'm currently reworking this in the [this branch](https://github.com/SaschaWillems/Vulkan/tree/proper_sync_dynamic_cb). While still work-in-progress, if you're interested in a more proper way of synchronization in Vulkan, please take a look at that branch.
+Synchronization in the master branch currently isn't optimal und uses ```vkDeviceQueueWaitIdle``` at the end of each frame. This is a heavy operation and is suboptimal in regards to having CPU and GPU operations run in parallel. I'm currently reworking this in the [this branch](https://github.com/SaschaWillems/Vulkan/tree/sync_rework_second_attempt). While still work-in-progress, if you're interested in a more proper way of synchronization in Vulkan, please take a look at that branch. Search for `useNewSync` to find samples that have been updated.
 
 
 ## Examples