chore: Update upgrading_to_vpn_v3.0.md (#116)

docs/upgrading_to_vpn_v3.0.md

@@ -2,7 +2,7 @@
 
 The v3.0 release contains backwards-incompatible changes.
 
-This update requires upgrading the minimum provider version `4.64`.
+This update requires upgrading the minimum provider version `4.74`.
 
 ### [Terraform](https://www.terraform.io/downloads.html) >= 1.3.0 is required as `peer_external_gateway`, `router_advertise_config`, `tunnels` and its nested attributes and objects are made optional
 Since [optional attributes](https://developer.hashicorp.com/terraform/language/expressions/type-constraints#optional-object-type-attributes) is a version 1.3 feature, the configuration will fail if the pinned version is < 1.3..