Update versions.tf

Author: zunairaahmad1

examples/gcp-linux-vm-spot/versions.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     google = {
       source  = "hashicorp/google"
-      version = "~> 5.11"
+      version = "~> 6.5"
     }
   }
 }