chore: improve variable description

Author: ludwig-mueller

solutions/ibm-catalog/sap-ready-to-go/README.md

@@ -83,7 +83,7 @@
 | <a name="input_powervs_os_registration_username"></a> [powervs\_os\_registration\_username](#input\_powervs\_os\_registration\_username) | If you're using a byol or a custom RHEL/SLES image for SAP HANA and Netweaver you need to provide your OS registration credentials here. Leave empty if you're using an IBM provided subscription (FLS). | `string` | `""` | no |
 | <a name="input_powervs_sap_network_cidr"></a> [powervs\_sap\_network\_cidr](#input\_powervs\_sap\_network\_cidr) | Network range for dedicated SAP network. Used for communication between SAP Application servers with SAP HANA Database. E.g., '10.53.0.0/24' | `string` | `"10.53.0.0/24"` | no |
 | <a name="input_powervs_zone"></a> [powervs\_zone](#input\_powervs\_zone) | IBM Cloud data center location corresponding to the location used in 'Power Virtual Server with VPC landing zone' pre-requisite deployment. | `string` | n/a | yes |
-| <a name="input_prefix"></a> [prefix](#input\_prefix) | Unique prefix for resources to be created (e.g., SAP system name). Max length must be less than or equal to 6. | `string` | n/a | yes |
+| <a name="input_prefix"></a> [prefix](#input\_prefix) | Unique prefix for resources to be created (e.g., SAP system name). Must be an alphanumeric string with maximum length of 6 characters. | `string` | n/a | yes |
 | <a name="input_prerequisite_workspace_id"></a> [prerequisite\_workspace\_id](#input\_prerequisite\_workspace\_id) | IBM Cloud Schematics workspace ID of an existing 'Power Virtual Server with VPC landing zone' catalog solution. If you do not yet have an existing deployment, click [here](https://cloud.ibm.com/catalog/architecture/deploy-arch-ibm-pvs-inf-2dd486c7-b317-4aaa-907b-42671485ad96-global?) to create one. | `string` | n/a | yes |
 | <a name="input_sap_domain"></a> [sap\_domain](#input\_sap\_domain) | SAP network domain name. | `string` | `"sap.com"` | no |
 | <a name="input_ssh_private_key"></a> [ssh\_private\_key](#input\_ssh\_private\_key) | Private SSH key (RSA format) used to login to IBM PowerVS instances. Should match to uploaded public SSH key referenced by 'ssh\_public\_key' which was created previously. The key is temporarily stored and deleted. For more information about SSH keys, see [SSH keys](https://cloud.ibm.com/docs/vpc?topic=vpc-ssh-keys). | `string` | n/a | yes |

solutions/ibm-catalog/sap-ready-to-go/variables.tf

@@ -15,7 +15,7 @@ variable "powervs_zone" {
 }
 
 variable "prefix" {
-  description = "Unique prefix for resources to be created (e.g., SAP system name). Max length must be less than or equal to 6."
+  description = "Unique prefix for resources to be created (e.g., SAP system name). Must be an alphanumeric string with maximum length of 6 characters."
   type        = string
   validation {
     condition     = length(var.prefix) <= 6 && can(regex("^[A-Za-z0-9]+$", var.prefix))