chore(deps): allow gitlab provider version 18.0 /2

- this time in the gitlab_agent_name_variable submodule

Author: jindraj

modules/gitlab_agent_name_variable/versions.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     gitlab = {
       source  = "gitlabhq/gitlab"
-      version = ">= 16.0, < 18.0"
+      version = ">= 16.0, < 19.0"
     }
   }
 }