fix(deps): update terraform ibm to latest for the deployable architecture solution

Author: terraform-ibm-modules-ops

solutions/standard/version.tf

@@ -5,7 +5,7 @@ terraform {
   required_providers {
     ibm = {
       source  = "IBM-Cloud/ibm"
-      version = "1.78.3"
+      version = "1.78.4"
     }
     time = {
       source  = "hashicorp/time"