Update upgrading_to_v36.0.md

Author: apeabody

docs/upgrading_to_v36.0.md

@@ -1,7 +1,7 @@
 # Upgrading to v36.0
 The v36.0 release of *kubernetes-engine* is a backwards incompatible release.
 
-### var.enable_gcfs removed from Autopilot
+### var.enable_gcfs removed from Autopilot sub-modules
 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
@@ -13,7 +13,7 @@ The variable `enable_gcfs` has been removed from the Autopilot sub-modules. Auto
 }
 ```
 
-### var.logging_variant removed from Autopilot
+### var.logging_variant removed from Autopilot sub-modules
 The variable `logging_variant` has been removed from the Autopilot sub-modules. It is only [applicable](https://cloud.google.com/kubernetes-engine/docs/how-to/adjust-log-throughput) to Standard clusters.
 
 ```diff