chore: update README.md

Author: actions-user

README.md

@@ -213,6 +213,7 @@ Here are automated tests for the complete example using [bats](https://github.co
 | <a name="input_iam_irsa_openid_connect_provider_arn"></a> [iam\_irsa\_openid\_connect\_provider\_arn](#input\_iam\_irsa\_openid\_connect\_provider\_arn) | ARN of the OpenID connect provider to allow usage of IRSA | `string` | `""` | no |
 | <a name="input_iam_irsa_openid_connect_provider_url"></a> [iam\_irsa\_openid\_connect\_provider\_url](#input\_iam\_irsa\_openid\_connect\_provider\_url) | URL of the OpenID connect provider to allow usage of IRSA | `string` | `""` | no |
 | <a name="input_iam_irsa_service_account"></a> [iam\_irsa\_service\_account](#input\_iam\_irsa\_service\_account) | Kubernetes ServiceAccount to allow to access the Elastic Domain via IRSA | `string` | `"system:serviceaccount:default:*"` | no |
+| <a name="input_iam_irsa_service_accounts"></a> [iam\_irsa\_service\_accounts](#input\_iam\_irsa\_service\_accounts) | Kubernetes ServiceAccounts to allow to access the Elastic Domain via IRSA | `list(string)` | `[]` | no |
 | <a name="input_iam_role_arns"></a> [iam\_role\_arns](#input\_iam\_role\_arns) | List of IAM role ARNs to permit access to the Elasticsearch domain | `list(string)` | `[]` | no |
 | <a name="input_iam_role_max_session_duration"></a> [iam\_role\_max\_session\_duration](#input\_iam\_role\_max\_session\_duration) | The maximum session duration (in seconds) for the user role. Can have a value from 1 hour to 12 hours | `number` | `3600` | no |
 | <a name="input_iam_role_permissions_boundary"></a> [iam\_role\_permissions\_boundary](#input\_iam\_role\_permissions\_boundary) | The ARN of the permissions boundary policy which will be attached to the Elasticsearch user role | `string` | `null` | no |