Fix: correct site name correctly in backup and drop multiple site jobs

[disha-itpl]

Summary

This PR fixes an issue in the backup-multiple-sites and drop-multiple-sites Helm job templates where the full site map was being passed to the --site flag instead of the actual site name.

Problem

The jobs iterate over:

sites:
  - name: "frappe.helpdesk.local"

However, the template previously used:

--site={{ $site }}

Since $site is a map (e.g., map[name:frappe.helpdesk.local]), the generated command became invalid:

bench --site=map[name:frappe.helpdesk.local] backup

This caused the jobs to fail.

Fix

Updated the templates to correctly reference:

--site={{ $site.name }}

This ensures the generated command is:

bench --site=frappe.helpdesk.local backup

The same correction has been applied to both:

• backup-multiple-sites
• drop-multiple-sites

Validation

• Deployed the updated chart.
• Verified that backup and drop jobs now execute successfully.
• Confirmed correct --site argument in generated pod logs.