fix: update version.tf in roks quickstart to allow tf 1.6 (#805)

Author: ocofaigh

patterns/roks-quickstart/version.tf

@@ -1,5 +1,5 @@
 terraform {
-  required_version = ">= 1.3, < 1.6"
+  required_version = ">= 1.3, < 1.7"
   required_providers {
     # renovate is set up to keep provider version at the latest for all DA solutions
     ibm = {