docs: updated prefix variable description - add a note for prefix change limitation (#944)

* updated description note for prefix behavior and upgrade limitations

* updated prefix description

* fix precommit

* update prefix description for fully-configurable DA

* update prefix description for quickstart DA

---------

Co-authored-by: Khuzaima-Shakeel <Khuzaima.Shakeel@ibm.com>
Co-authored-by: Shikha Maheshwari <maheshwari.shikha@gmail.com>

Author: 3 people

common-dev-assets

@@ -14,7 +14,7 @@ variable "ibmcloud_api_key" {
 variable "prefix" {
   type        = string
   nullable    = true
-  description = "The prefix to add to all resources that this solution creates (e.g `prod`, `test`, `dev`). To skip using a prefix, set this value to null or an empty string. [Learn more](https://terraform-ibm-modules.github.io/documentation/#/prefix.md)."
+  description = "The prefix to add to all resources that this solution creates (e.g `prod`, `test`, `dev`). To skip using a prefix, set this value to null or an empty string. [Learn more](https://terraform-ibm-modules.github.io/documentation/#/prefix.md). **Important:** When deploying VPC using VPC deployable architecture, updating the prefix after the initial deployment may require recreating certain resources. Learn more about this limitation [here](https://cloud.ibm.com/docs/secure-infrastructure-vpc?topic=secure-infrastructure-vpc-known-issues#ki-vpc-prefix-change-recreate)."
 
   validation {
     # - null and empty string is allowed

solutions/fully-configurable/variables.tf

@@ -24,7 +24,7 @@ variable "provider_visibility" {
 
 variable "prefix" {
   type        = string
-  description = "The prefix to add to all resources that this solution creates (e.g `prod`, `test`, `dev`). To skip using a prefix, set this value to null or an empty string. [Learn more](https://terraform-ibm-modules.github.io/documentation/#/prefix.md)."
+  description = "The prefix to add to all resources that this solution creates (e.g `prod`, `test`, `dev`). To skip using a prefix, set this value to null or an empty string. [Learn more](https://terraform-ibm-modules.github.io/documentation/#/prefix.md). **Important:** Updating the prefix after the initial deployment may require recreating certain resources. Learn more about this limitation [here](https://cloud.ibm.com/docs/secure-infrastructure-vpc?topic=secure-infrastructure-vpc-known-issues#ki-vpc-prefix-change-recreate). "
   nullable    = true
   validation {
     condition = (var.prefix == null || var.prefix == "" ? true :