Point changelog to master branch

Change-Id: I34f96518fb769d434389cf0c6b83b0c509a12ad5

Author: mattcary

CHANGELOG/README.md

@@ -1,5 +1,3 @@
 # CHANGELOGs
 
-- [CHANGELOG v1.0.0](./CHANGELOG-1.0.md)
-- [CHANGELOG v0.7.0](./CHANGELOG-0.7.md)
-- [CHANGELOG v0.6.0](./CHANGELOG-0.6.md)
+Please refer to [CHANGELOGs in master branch](https://github.com/kubernetes-sigs/gcp-compute-persistent-disk-csi-driver/blob/master/CHANGELOG/CHANGELOG-1.3.md)