fix(vpc): add use case info

Author: RoRoJ

network/vpc/reference-content/use-case-basic.mdx

@@ -72,10 +72,10 @@ Follow the steps below to create this infrastructure using the [Scaleway console
 
 1. [Create a VPC](/network/vpc/how-to/create-vpc/) (or use the [default VPC](/network/vpc/how-to/create-vpc/#how-to-identify-your-default-vpcs) pre-created for each Scaleway Project in the appropriate [region](/network/vpc/concepts/#region-and-availability-zone)).
 2. [Create a Private Network](/network/vpc/how-to/create-private-network/) inside the VPC. You can either let Scaleway create the network with an auto-generate subnet, which will provide the private IP addresses for attached resources, or specify a self-defined subnet.
-3. [Create a Public Gateway](/network/public-gateways/how-to/create-a-public-gateway/) (TODO should it advertize the default route?) and [attach it to the Private Network](/network/public-gateways/how-to/configure-a-public-gateway/#how-to-attach-a-public-gateway-to-a-private-network).
+3. [Create a Public Gateway](/network/public-gateways/how-to/create-a-public-gateway/) (set it to advertise the [default route](/network/public-gateways/concepts/#default-route)) and [attach it to the Private Network](/network/public-gateways/how-to/configure-a-public-gateway/#how-to-attach-a-public-gateway-to-a-private-network).
 4. [Set up SSH bastion](/network/public-gateways/how-to/use-ssh-bastion/) on the Public Gateway, to allow administrator access.
 5. [Create a Managed Database](/managed-databases/postgresql-and-mysql/how-to/create-a-database/)
-6. [Detach the Managed Database's public endpoint](/managed-databases/postgresql-and-mysql/how-to/remove-public-endpoint/) [QUESTION - NECESSARY?] and [attach it to the Private Network](/managed-databases/postgresql-and-mysql/how-to/connect-database-private-network/) you created in step 2.
+6. [Detach the Managed Database's public endpoint](/managed-databases/postgresql-and-mysql/how-to/remove-public-endpoint/) and [attach it to the Private Network](/managed-databases/postgresql-and-mysql/how-to/connect-database-private-network/) you created in step 2.
 7. Create and configure external services as required, e.g. [Object Storage](/storage/object/quickstart/), [Transactional Email](/managed-services/transactional-email/quickstart/) and [Secret Manager](/identity-and-access-management/secret-manager/quickstart/).
 8. [Create your Instances](/compute/instances/how-to/create-an-instance/), using the configuration best-suited to your application. Do not assign public IPv4 or IPv6 addresses to the Instances. Add Block Storage volumes as required (or you can create and attach these [later](/storage/block/quickstart/).)
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