fix project factory deletion_policy and max TPG 6+

docs/upgrading_to_v10.0.md

@@ -1,7 +1,8 @@
 # Upgrading to Log Export v10.0
 
-## TPG minimum provider version
+## Provider version
 - The v10.0 release of Log Export is a backwards incompatible release and features a new feature `intercept_children` for folder and organization logging sinks. Minimum provider version `5.27` ia required.
-
-## TPG maximum provider version
 - Allows maximum provider version 6+
+
+## Terraform version
+- Terraform version 1.3+ required