chore(deps): Update Terraform terraform-google-modules/sql-db/google to v26 (#745)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

examples/mssql-failover-replica/main.tf

@@ -56,7 +56,7 @@ module "mssql1" {
 
 module "mssql2" {
   source  = "terraform-google-modules/sql-db/google//modules/mssql"
-  version = "~> 25.0"
+  version = "~> 26.0"
 
   master_instance_name = module.mssql1.instance_name