Update upgrading_to_v36.0.md

Author: apeabody

docs/upgrading_to_v36.0.md

@@ -2,7 +2,7 @@
 The v36.0 release of *kubernetes-engine* is a backwards incompatible release.
 
 ### var.enable_gcfs removed from Autopilot
-The variable `enable_gcfs` has been removed from the Autopilot sub-modules. Autopilot clusters that run GKE version `1.25.5-gke.1000` and later use Image streaming.
+The variable `enable_gcfs` has been removed from the Autopilot sub-modules. Autopilot clusters that run GKE version `1.25.5-gke.1000` and later use [Image streaming](https://cloud.google.com/kubernetes-engine/docs/how-to/image-streaming).
 
 ```diff
   module "cluster" {