chore(sqlserverflex): docs adjustments (#756)

relates to STACKITTPR-169 / #729

Author: rubenhoenle

docs/resources/sqlserverflex_instance.md

@@ -22,7 +22,6 @@ resource "stackit_sqlserverflex_instance" "example" {
     cpu = 4
     ram = 16
   }
-  replicas = 3
   storage = {
     class = "class"
     size  = 5

docs/resources/sqlserverflex_user.md

@@ -33,7 +33,7 @@ resource "stackit_sqlserverflex_user" "example" {
 ### Optional
 
 - `region` (String)
-- `roles` (Set of String) Database access levels for the user.
+- `roles` (Set of String) Database access levels for the user. The values for the default roles are: `##STACKIT_DatabaseManager##`, `##STACKIT_LoginManager##`, `##STACKIT_ProcessManager##`, `##STACKIT_ServerManager##`, `##STACKIT_SQLAgentManager##`, `##STACKIT_SQLAgentUser##`
 
 ### Read-Only
 

examples/resources/stackit_sqlserverflex_instance/resource.tf

@@ -7,7 +7,6 @@ resource "stackit_sqlserverflex_instance" "example" {
     cpu = 4
     ram = 16
   }
-  replicas = 3
   storage = {
     class = "class"
     size  = 5

stackit/internal/services/sqlserverflex/user/resource.go

@@ -139,7 +139,7 @@ func (r *userResource) Schema(_ context.Context, _ resource.SchemaRequest, resp
 		"instance_id": "ID of the SQLServer Flex instance.",
 		"project_id":  "STACKIT project ID to which the instance is associated.",
 		"username":    "Username of the SQLServer Flex instance.",
-		"roles":       "Database access levels for the user.",
+		"roles":       "Database access levels for the user. The values for the default roles are: `##STACKIT_DatabaseManager##`, `##STACKIT_LoginManager##`, `##STACKIT_ProcessManager##`, `##STACKIT_ServerManager##`, `##STACKIT_SQLAgentManager##`, `##STACKIT_SQLAgentUser##`",
 		"password":    "Password of the user account.",
 	}