fix: pgsql_api_updates (#16)

## Description

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relates to #1234

## Checklist

- [ ] Issue was linked above
- [ ] Code format was applied: `make fmt`
- [ ] Examples were added / adjusted (see `examples/` directory)
- [x] Docs are up-to-date: `make generate-docs` (will be checked by CI)
- [ ] Unit tests got implemented or updated
- [ ] Acceptance tests got implemented or updated (see e.g. [here](f5f99d1709/stackit/internal/services/dns/dns_acc_test.go))
- [x] Unit tests are passing: `make test` (will be checked by CI)
- [x] No linter issues: `make lint` (will be checked by CI)

Reviewed-on: #16

stackit/internal/services/postgresflexalpha/instance/resource.go

@@ -261,13 +261,11 @@ func modelToCreateInstancePayload(netAcl []string, model postgresflexalpha.Insta
 		Encryption:     &enc,
 		FlavorId:       model.FlavorId.ValueStringPointer(),
 		Name:           model.Name.ValueStringPointer(),
-		Network: &postgresflex.InstanceNetwork{
+		Network: &postgresflex.InstanceNetworkCreate{
 			AccessScope: postgresflex.InstanceNetworkGetAccessScopeAttributeType(
 				model.Network.AccessScope.ValueStringPointer(),
 			),
-			Acl:             &netAcl,
-			InstanceAddress: model.Network.InstanceAddress.ValueStringPointer(),
-			RouterAddress:   model.Network.RouterAddress.ValueStringPointer(),
+			Acl: &netAcl,
 		},
 		Replicas:      postgresflex.CreateInstanceRequestPayloadGetReplicasAttributeType(&replVal),
 		RetentionDays: model.RetentionDays.ValueInt64Pointer(),
@@ -452,10 +450,7 @@ func (r *instanceResource) Update(ctx context.Context, req resource.UpdateReques
 		BackupSchedule: model.BackupSchedule.ValueStringPointer(),
 		FlavorId:       model.FlavorId.ValueStringPointer(),
 		Name:           model.Name.ValueStringPointer(),
-		Network: &postgresflex.InstanceNetwork{
-			AccessScope: postgresflex.InstanceNetworkGetAccessScopeAttributeType(
-				model.Network.AccessScope.ValueStringPointer(),
-			),
+		Network: &postgresflex.InstanceNetworkUpdate{
 			Acl: &netAcl,
 		},
 		Replicas:      postgresflex.UpdateInstanceRequestPayloadGetReplicasAttributeType(&replInt32),