[xwiki-notifications] [jira@xwiki.org][Issue] (XWIKI-16770) Introduce a migration to fix all attachments with an empty name

Attachments:

• attachment.html (text/html — 12.3 KB)
• attachment.png (image/png — 419 bytes)
• attachment.png (image/png — 1.1 KB)
• attachment.jpg (image/jpeg — 2.8 KB)