Fixed: Trans Choice in Unaccepted Asset Email

[akemidx]

Fixed an issue where the body of an email did not pluralize items when multiple items were unaccepted.

[what-the-diff]

PR Summary

• Enhanced String Localization in Notification Emails
  The notification email system's 'item_checked_reminder' message has been improved to handle singular and plural forms more effectively. This was achieved through a new pipe-separated string approach.

• Improved Grammatical Accuracy in Notification Messages
  Fixed a small grammatical issue in the 'unaccepted_asset_reminder' string. Now it uses 'Asset(s)' instead of 'Asset', appropriately representing both single and multiple assets.

• Optimized Pluralization in Notification Messages
  Adjusted the way the 'item_checked_reminder' message is utilized in the notification system. Instead of the previous method, we now use the trans_choice function, which is more effective in handling pluralization.

• Improved Readability in Notification Templates
  Addressed a minor formatting issue inside our notification email templates where the greeting line had incorrect spacing. After this fix, the greeting line is more readable and visually appealing.

[snipe]

This weeks awkward to me - I think we'd want to trans_choice the subject here as well