Reduce Zerobyte default CPU and RAM

Lower default resources for the Zerobyte container: reduce CPU from 4 to 2 and RAM to 2048 MB. Update ct/zerobyte.sh (var_cpu and var_ram) and frontend/public/json/zerobyte.json (UI resources) so the script and frontend metadata remain consistent.

ct/zerobyte.sh

@@ -7,8 +7,8 @@ source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxV
 
 APP="Zerobyte"
 var_tags="${var_tags:-backup;encryption;restic}"
-var_cpu="${var_cpu:-4}"
-var_ram="${var_ram:-6192}"
+var_cpu="${var_cpu:-2}"
+var_ram="${var_ram:-2048}"
 var_disk="${var_disk:-10}"
 var_os="${var_os:-debian}"
 var_version="${var_version:-13}"

frontend/public/json/zerobyte.json

@@ -20,7 +20,7 @@
             "script": "ct/zerobyte.sh",
             "resources": {
                 "cpu": 2,
-                "ram": 4096,
+                "ram": 2048,
                 "hdd": 10,
                 "os": "Debian",
                 "version": "13"