Document possible values of schema fields (#455)

* Document possible values of schema fields

* Change from possible to supported

docs/resources/dns_zone.md

@@ -47,7 +47,7 @@ resource "stackit_dns_zone" "example" {
 - `primaries` (List of String) Primary name server for secondary zone. E.g. ["1.2.3.4"]
 - `refresh_time` (Number) Refresh time. E.g. 3600
 - `retry_time` (Number) Retry time. E.g. 600
-- `type` (String) Zone type. Defaults to `primary`
+- `type` (String) Zone type. Defaults to `primary`. Supported values are: `primary`, `secondary`.
 
 ### Read-Only
 

docs/resources/loadbalancer.md

@@ -203,7 +203,7 @@ Optional:
 
 - `display_name` (String)
 - `port` (Number) Port number where we listen for traffic.
-- `protocol` (String) Protocol is the highest network protocol we understand to load balance.
+- `protocol` (String) Protocol is the highest network protocol we understand to load balance. Supported values are: `PROTOCOL_UNSPECIFIED`, `PROTOCOL_TCP`, `PROTOCOL_UDP`, `PROTOCOL_TCP_PROXY`, `PROTOCOL_TLS_PASSTHROUGH`.
 - `server_name_indicators` (Attributes List) A list of domain names to match in order to pass TLS traffic to the target pool in the current listener (see [below for nested schema](#nestedatt--listeners--server_name_indicators))
 - `target_pool` (String) Reference target pool by target pool name.
 
@@ -225,7 +225,7 @@ Required:
 
 Optional:
 
-- `role` (String) The role defines how the load balancer is using the network.
+- `role` (String) The role defines how the load balancer is using the network. Supported values are: `ROLE_UNSPECIFIED`, `ROLE_LISTENERS_AND_TARGETS`, `ROLE_LISTENERS`, `ROLE_TARGETS`.
 
 
 <a id="nestedatt--target_pools"></a>

docs/resources/mongodbflex_user.md

@@ -30,7 +30,7 @@ resource "stackit_mongodbflex_user" "example" {
 - `database` (String)
 - `instance_id` (String) ID of the MongoDB Flex instance.
 - `project_id` (String) STACKIT project ID to which the instance is associated.
-- `roles` (Set of String) Database access levels for the user.
+- `roles` (Set of String) Database access levels for the user. Supported values are: `read`, `readWrite`.
 
 ### Optional
 

docs/resources/postgresflex_user.md

@@ -28,7 +28,7 @@ resource "stackit_postgresflex_user" "example" {
 
 - `instance_id` (String) ID of the PostgresFlex instance.
 - `project_id` (String) STACKIT project ID to which the instance is associated.
-- `roles` (Set of String)
+- `roles` (Set of String) Database access levels for the user. Supported values are: `login`, `createdb`.
 - `username` (String)
 
 ### Read-Only