chore(deps): update axllent/mailpit docker tag to v1.21.6

[renovate]

This PR contains the following updates:

Package	Update	Change	OpenSSF
axllent/mailpit (source)	minor	v1.20.6 -> v1.21.6

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Release Notes

axllent/mailpit (axllent/mailpit)

v1.21.6

Compare Source

Feature

• Include Mailpit label (if set) in webhook HTTP header (#​400)
• Add support for sending inline attachments via HTTP API (#​399)

Chore

• Update caniemail database
• Update node dependencies
• Update Go dependencies

Fix

• Message view not updating when deleting messages from search (#​395)

v1.21.5

Compare Source

Chore

• Update caniemail database
• Update node dependencies
• Update Go dependencies
• Make symlink detection more specific to contain "sendmail" in the name (#​391)

v1.21.4

Compare Source

Bugfix

• Fix external CSS stylesheet loading in HTML preview (#​388)

v1.21.3

Compare Source

Chore

• Update Go dependencies
• Minor UI tweaks
• Mute Dart Sass deprecation notices
• Update node dependencies
• Upgrade Alpine packages on Docker build
• Add swagger examples & API code restructure

v1.21.2

Compare Source

Feature

• Add additional ignored flags to sendmail (#​384)

Chore

• Remove legacy Tags column from message DB table
• Update Go dependencies
• Update node dependencies

Fix

• Fix browser notification request on Edge (#​89)

v1.21.1

Compare Source

Feature

• Add ability to search by size smaller or larger than a value (eg: larger:1M / smaller:2.5M)
• Add ability to search for messages containing inline images (has:inline)

Chore

• Update Go dependencies
• Separate attachments and inline images in download nav and badges (#​379)

v1.21.0

Compare Source

Feature

• Experimental Unix socket support for HTTPD & SMTPD (#​373)

Fix

• Allow multiple item selection on macOS with Cmd-click (#​378)

v1.20.7

Compare Source

Chore

• Update caniemail database

Fix

• SQL error deleting a tag while using tenant-id (#​374)

Testing

• Add tenantIDs to tests

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[simonhir]

Currently only version 1.20 is internally allowed.
We need to discuss how to generally handle the versions of this dev dependencies.

[devtobi]

Waiting for internal decision on how to handle internal allowed images for development (see https://git.muenchen.de/ccse/ospo/-/issues/513)

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