Document new nodeVolumeDetachTimeout timeout and machine.cluster.x-k8s.io/exclude-wait-for-node-volume-detach annotation

in v1.2 to v1,3 providers migration guide

Author: furkatgofurov7

docs/book/src/developer/providers/v1.2-to-v1.3.md

@@ -28,7 +28,9 @@ in Cluster API are kept in sync with the versions used by `sigs.k8s.io/controlle
 
 ### API Changes
 
--
+- A new timeout `nodeVolumeDetachTimeout` has been introduced that defines how long the controller will spend on waiting for all volumes to be detached.
+The default value is 0, meaning that the volume can be detached without any time limitations.
+- A new annotation `machine.cluster.x-k8s.io/exclude-wait-for-node-volume-detach` has been introduced that allows explicitly skip the waiting for node volume detaching.
 
 ### Other