chore: change log for v13.21.0

[rohitwaghchaure]

Version 13.21.0 Release Notes

Features & Enhancements

• Add breadcrumbs in dashboard view (#15835)
• Add Attach Image in Add Fetch feature (#15799)
• Allow all users to customize reports of type Report Builder (#15918)
• Additional filter support (#14102)

Fixes

• Image action not in center of image in mobile view (#15969)
• Libsass issue with min() (#15982)
• Delete chat message attachments (#15852)
• Check if valid file instead of path [v13] (#15936)
• Thumbnail for external images (from URL) [v13] (#15838)
• Added translation for Yes/No (#15884)
• Updated translations (#15879)
• Doctype name/table-name in database is limited to 64 character (#15826)
• Added regex for alerts (#15833)
• Primary color for progress bar (#15839)
• Data exporter throwing exception (#15561)
• Primary color for checkbox and radio (#15842)
• Call validate_link only if "value" is passed (#15856)
• Validate doc naming when set via prompt or by passing set_name (#15746)
• User permission for restricting nested struct (#14079)
• Translate default msgprint title in backend (#15769)
• Sync index & unique constraint changes in DB (#15680)