docs: add example on how to grant security manager role with github_organization_role_team resource (integrations#3031)

* docs: add example on how to grant security manager role with github_organization_role_team resource

Signed-off-by: AvivGuiser <avivguiser@gmail.com>

* fix missing quotes

Signed-off-by: AvivGuiser <avivguiser@gmail.com>

* remove splat for example

Signed-off-by: AvivGuiser <avivguiser@gmail.com>

---------

Signed-off-by: AvivGuiser <avivguiser@gmail.com>

Author: KyriosGN0

website/docs/r/organization_role_team.html.markdown

@@ -18,6 +18,21 @@ resource "github_organization_role_team" "example" {
 }
 ```
 
+## Example Usage Security Manager Role
+
+```terraform
+locals {
+  security_manager_id = one([for x in data.github_organization_roles.all_roles.roles : x.role_id if x.name == "security_manager"])
+}
+
+data "github_organization_roles" "all_roles" {}
+
+resource "github_organization_role_team" "security_managers" {
+  role_id   = local.security_manager_id
+  team_slug = "example-team"
+}
+```
+
 ## Schema
 
 ### Required